The model contains one compartment called "compartment". There are three species named S1, S2 and S3 and two parameters named k1 and k2. The model contains two reactions defined as:

Reaction | Rate
S1 + S2 → S3 | multiply(k1, S1, S2) · compartment
S3 → S1 + S2 | k2 · S3 · compartment

The model contains one functionDefinition defined as:

Id | Arguments | Formula
multiply | x, y, z | x · y · z

The initial conditions are as follows:

| Value | Units
Initial amount of S1 | 1.0 × 10−4 | mole
Initial amount of S2 | 2.0 × 10−4 | mole
Initial amount of S3 | 1.0 × 10−4 | mole
Value of parameter k1 | 0.75 | litre mole-1 second-1
Value of parameter k2 | 0.25 | 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.