The model contains one compartment called "compartment". There are four species named S1, S2, S3 and S4 and two parameters named k1 and k2. Both species S3 and S4 are labeled as an SBML boundary species. The model contains two reactions defined as:

Reaction Rate
S1 + S2 → S3 k1 · S1 · S2 · compartment
S3 → S1 + S2 k2 · S3 · compartment

The model contains one rule:

Type Variable Formula
Rate S4 1 10−7

The initial conditions are as follows:

Value Units
Initial amount of S1 1.5 × 10−6 mole
Initial amount of S2 2.0 × 10−6 mole
Initial amount of S3 1.5 × 10−6 mole
Initial amount of S4 1 × 10−6 mole
Value of parameter k1 0.75 × 106 mole-1 second-1
Value of parameter k2 0.25 × 10−3 second-1
Volume of compartment "compartment" 1 litre

The species values are given as amounts of substance to make it easier to use the model in a discrete stochastic simulator, but (as per usual SBML principles) their symbols represent their values in concentration units where they appear in expressions.