<?xml version="1.0" encoding="UTF-8" ?>

<PDBx:datablock datablockName="A1END"
   xmlns:PDBx="http://pdbml.pdb.org/schema/pdbx-v50.xsd"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://pdbml.pdb.org/schema/pdbx-v50.xsd pdbx-v50.xsd">

   <PDBx:chem_compCategory>
      <PDBx:chem_comp id="A1END">
         <PDBx:formula>C4 H3 F N2 O S</PDBx:formula>
         <PDBx:formula_weight>146.143</PDBx:formula_weight>
         <PDBx:name>5-fluoranyl-4-sulfanylidene-1~{H}-pyrimidin-2-one</PDBx:name>
         <PDBx:pdbx_ambiguous_flag>N</PDBx:pdbx_ambiguous_flag>
         <PDBx:pdbx_formal_charge>0</PDBx:pdbx_formal_charge>
         <PDBx:pdbx_ideal_coordinates_details>Corina</PDBx:pdbx_ideal_coordinates_details>
         <PDBx:pdbx_ideal_coordinates_missing_flag>N</PDBx:pdbx_ideal_coordinates_missing_flag>
         <PDBx:pdbx_initial_date>2025-03-18</PDBx:pdbx_initial_date>
         <PDBx:pdbx_model_coordinates_db_code>9M9C</PDBx:pdbx_model_coordinates_db_code>
         <PDBx:pdbx_model_coordinates_missing_flag>N</PDBx:pdbx_model_coordinates_missing_flag>
         <PDBx:pdbx_modified_date>2026-03-13</PDBx:pdbx_modified_date>
         <PDBx:pdbx_processing_site>PDBC</PDBx:pdbx_processing_site>
         <PDBx:pdbx_release_status>REL</PDBx:pdbx_release_status>
         <PDBx:pdbx_type>HETAIN</PDBx:pdbx_type>
         <PDBx:three_letter_code>A1END</PDBx:three_letter_code>
         <PDBx:type>non-polymer</PDBx:type>
      </PDBx:chem_comp>
   </PDBx:chem_compCategory>
   <PDBx:chem_comp_atomCategory>
      <PDBx:chem_comp_atom atom_id="N1" comp_id="A1END">
         <PDBx:alt_atom_id>N1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-19.183</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>31.259</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.877</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>N1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>1.798</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>0.955</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.005</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>1</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>N</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="C4" comp_id="A1END">
         <PDBx:alt_atom_id>C1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-17.457</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>33.351</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.629</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>C4</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>-0.563</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-0.393</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.003</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>2</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>C</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="C1" comp_id="A1END">
         <PDBx:alt_atom_id>C2</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-17.036</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>32.154</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-40.257</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>C1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>-0.555</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>1.023</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>-0.001</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>3</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>C</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="C2" comp_id="A1END">
         <PDBx:alt_atom_id>C3</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-17.925</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>31.128</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-40.383</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>C2</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>0.628</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>1.673</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.005</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>4</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>C</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="C3" comp_id="A1END">
         <PDBx:alt_atom_id>C4</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-19.625</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>32.401</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.263</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>C3</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>1.774</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-0.391</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>-0.001</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>5</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>C</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="F1" comp_id="A1END">
         <PDBx:alt_atom_id>F1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-15.777</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>32.021</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-40.712</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>F1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>-1.717</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>1.713</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>-0.006</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>6</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>F</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="N2" comp_id="A1END">
         <PDBx:alt_atom_id>N2</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-18.731</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>33.434</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.136</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>N2</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>0.608</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-1.062</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>-0.002</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>7</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>N</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="O1" comp_id="A1END">
         <PDBx:alt_atom_id>O1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-20.768</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>32.498</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-38.841</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>O1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>2.821</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-1.009</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>-0.005</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>8</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>O</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="S1" comp_id="A1END">
         <PDBx:alt_atom_id>S1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-16.442</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>34.689</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.452</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>S1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>-2.046</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-1.249</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.002</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>9</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>S</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="H2" comp_id="A1END">
         <PDBx:alt_atom_id>H1</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-19.813</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>30.486</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-39.957</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>H2</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>2.649</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>1.421</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.005</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>10</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>H</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="H1" comp_id="A1END">
         <PDBx:alt_atom_id>H2</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-17.633</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>30.216</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-40.882</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>H1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>0.654</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>2.753</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.010</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>11</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>H</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="H3" comp_id="A1END">
         <PDBx:alt_atom_id>H3</PDBx:alt_atom_id>
         <PDBx:charge>0</PDBx:charge>
         <PDBx:model_Cartn_x>-19.018</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>34.271</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>-38.670</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>H3</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>A1END</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>0.609</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>-2.032</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>0.001</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>12</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>H</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
   </PDBx:chem_comp_atomCategory>
   <PDBx:chem_comp_bondCategory>
      <PDBx:chem_comp_bond atom_id_1="F1" atom_id_2="C1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>1</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C2" atom_id_2="C1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>2</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>doub</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C2" atom_id_2="N1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>3</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C1" atom_id_2="C4" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>4</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="N1" atom_id_2="C3" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>5</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C4" atom_id_2="S1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>6</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>doub</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C4" atom_id_2="N2" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>7</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C3" atom_id_2="N2" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>8</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C3" atom_id_2="O1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>9</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>doub</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="N1" atom_id_2="H2" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>10</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="C2" atom_id_2="H1" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>11</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="N2" atom_id_2="H3" comp_id="A1END">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>12</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
   </PDBx:chem_comp_bondCategory>
   <PDBx:pdbx_chem_comp_auditCategory>
      <PDBx:pdbx_chem_comp_audit action_type="Create component" comp_id="A1END" date="2025-03-18">
         <PDBx:processing_site>PDBC</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Initial release" comp_id="A1END" date="2026-03-18">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
   </PDBx:pdbx_chem_comp_auditCategory>
   <PDBx:pdbx_chem_comp_descriptorCategory>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="InChI" program_version="1.06" type="InChI">
         <PDBx:descriptor>InChI=1S/C4H3FN2OS/c5-2-1-6-4(8)7-3(2)9/h1H,(H2,6,7,8,9)</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="InChI" program_version="1.06" type="InChIKey">
         <PDBx:descriptor>SOEINGHMICSQAA-UHFFFAOYSA-N</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="CACTVS" program_version="3.385" type="SMILES_CANONICAL">
         <PDBx:descriptor>FC1=CNC(=O)NC1=S</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="CACTVS" program_version="3.385" type="SMILES">
         <PDBx:descriptor>FC1=CNC(=O)NC1=S</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="OpenEye OEToolkits" program_version="2.0.7" type="SMILES_CANONICAL">
         <PDBx:descriptor>C1=C(C(=S)NC(=O)N1)F</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="A1END" program="OpenEye OEToolkits" program_version="2.0.7" type="SMILES">
         <PDBx:descriptor>C1=C(C(=S)NC(=O)N1)F</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
   </PDBx:pdbx_chem_comp_descriptorCategory>
   <PDBx:pdbx_chem_comp_identifierCategory>
      <PDBx:pdbx_chem_comp_identifier comp_id="A1END" program="OpenEye OEToolkits" program_version="2.0.7" type="SYSTEMATIC NAME">
         <PDBx:identifier>5-fluoranyl-4-sulfanylidene-1~{H}-pyrimidin-2-one</PDBx:identifier>
      </PDBx:pdbx_chem_comp_identifier>
   </PDBx:pdbx_chem_comp_identifierCategory>
</PDBx:datablock>
