<?xml version='1.0' encoding='UTF-8' standalone='no'?>
<sbml xmlns="http://www.sbml.org/sbml/level2" level="2" version="1">
  <model>
    <listOfCompartments>
        <compartment id="compartment" name="compartment" spatialDimensions="1" size="1" constant="true"/>
    </listOfCompartments>
    <listOfSpecies>
      <species compartment="compartment" id="X1" initialConcentration="0.5"/>
      <species compartment="compartment" id="X2" initialConcentration="1"/>
    </listOfSpecies>
    <listOfParameters>
      <parameter name="alpha" id="alpha" value="1"/>
      <parameter name="beta" id="beta" value="1"/>
      <parameter name="gamma" id="gamma" value="4"/>
      <parameter name="delta" id="delta" value="1"/>
    </listOfParameters>
    <listOfReactions>
      <reaction id="R1">
        <listOfReactants>
          <speciesReference species="X1" />
        </listOfReactants>
        <listOfProducts>
          <speciesReference species="X1" />
          <speciesReference species="X1" />
        </listOfProducts>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> alpha </ci>
              <ci> X1 </ci>
            </apply>
          </math>
        </kineticLaw>
      </reaction>
      <reaction id="R2">
        <listOfReactants>
          <speciesReference species="X1" />
        </listOfReactants>
        <listOfModifiers>
          <modifierSpeciesReference species="X2"/>
        </listOfModifiers>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> beta </ci>
              <ci> X1 </ci>
              <ci> X2 </ci>
            </apply>
          </math>
        </kineticLaw>
      </reaction>
      <reaction id="R3">
        <listOfReactants>
          <speciesReference species="X2" />
        </listOfReactants>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> gamma </ci>
              <ci> X2 </ci>
            </apply>
          </math>
        </kineticLaw>
      </reaction>
      <reaction id="R4">
        <listOfReactants>
          <speciesReference species="X2" />
        </listOfReactants>
        <listOfProducts>
          <speciesReference species="X2" />
          <speciesReference species="X2" />
        </listOfProducts>
        <listOfModifiers>
          <modifierSpeciesReference species="X1"/>
        </listOfModifiers>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> delta </ci>
              <ci> X1 </ci>
              <ci> X2 </ci>
            </apply>
          </math>
        </kineticLaw>
      </reaction>
    </listOfReactions>
  </model>
</sbml>