The model contains one compartment called "compartment". There are two species named S1 and S2 and two parameters named k1 and k2. Compartment "compartment" is 0-dimensional. The model contains two reactions defined as:

Reaction Rate
S1 → 2 S2 k1 · S1
2 S2 → S1 k2 · S2 · S2

Note the stoichiometry of S2 is 2 in both reactions.

The initial conditions are as follows:

Value Units
Initial amount of S1 1.5 × 10−4 mole
Initial amount of S2 0 mole
Value of parameter k1 0.35 second-1
Value of parameter k2 180 mole-1 second-1

In this example the compartment has its spatialDimensions attribute set to zero; i.e., it represents a point and therefore cannot have size or units. The species values must be treated as amounts and not concentrations.