Couldn't generate code for the following reason:
Variable has units second_order_rate_constant which are incompatible with the units first_order_rate_constant on a connected variable.; 
  In MathML apply element.
  In MathML math element.
  In CellMLComponent element with cmeta:id C3 with name C3.
  In Model element with cmeta:id saftenku_H1_model_2001_version02 with name saftenku_williams_sitsapesan_2001_version03.