    <?xml version="1.0" encoding="UTF-8"?>
    <sbml xmlns="http://www.sbml.org/sbml/level3/version1/core" level="3" version="1">
      <model>
        <listOfCompartments>
          <compartment id="compartment" spatialDimensions="3" size="1" constant="true"/>
        </listOfCompartments>
        <listOfSpecies>
          <species id="S"     compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="A__E"  compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="A__D"  compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="A__ES" compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="B__E"  compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="B__D"  compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
          <species id="B__ES" compartment="compartment" hasOnlySubstanceUnits="false"
                              boundaryCondition="false" constant="false"/>
        </listOfSpecies>
        <listOfReactions>
          <reaction id="A__J0" reversible="true" fast="false">
            <listOfReactants>
              <speciesReference species="S" stoichiometry="1" constant="true"/>
              <speciesReference species="A__E" stoichiometry="1" constant="true"/>
            </listOfReactants>
            <listOfProducts>
              <speciesReference species="A__ES" stoichiometry="1" constant="true"/>
            </listOfProducts>
          </reaction>
          <reaction id="A__J1" reversible="true" fast="false">
            <listOfReactants>
              <speciesReference species="A__ES" stoichiometry="1" constant="true"/>
            </listOfReactants>
            <listOfProducts>
              <speciesReference species="A__E" stoichiometry="1" constant="true"/>
              <speciesReference species="A__D" stoichiometry="1" constant="true"/>
            </listOfProducts>
          </reaction>
          <reaction id="B__J0" reversible="true" fast="false">
            <listOfReactants>
              <speciesReference species="S" stoichiometry="1" constant="true"/>
              <speciesReference species="B__E" stoichiometry="1" constant="true"/>
            </listOfReactants>
            <listOfProducts>
              <speciesReference species="B__ES" stoichiometry="1" constant="true"/>
            </listOfProducts>
          </reaction>
          <reaction id="B__J1" reversible="true" fast="false">
            <listOfReactants>
              <speciesReference species="B__ES" stoichiometry="1" constant="true"/>
            </listOfReactants>
            <listOfProducts>
              <speciesReference species="B__E" stoichiometry="1" constant="true"/>
              <speciesReference species="B__D" stoichiometry="1" constant="true"/>
            </listOfProducts>
          </reaction>
        </listOfReactions>
      </model>
    </sbml>