The model contains one compartment called "compartment". There are two species named S1 and S2 and one parameter named k1. Compartment "compartment" is two-dimensional. Species S1 and S2 are declared to have only substance units. The model contains one reaction defined as:

Reaction Rate
S1 → S2 k1 · S1

The initial conditions are as follows:

Value Units
Initial amount of S1 1.5 × 10−4 mole
Initial amount of S2 1 × 10−4 mole
Value of parameter k1 1 second-1
Area of compartment "compartment" 1 metre2

The species have been declared as having substance units only. Thus, they must be treated as amounts where they appear in expressions.