Linear three-compartmental system

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d/dt(q₁) = k₁₂(q₂)-k₂₁(q₁)

d/dt(q₂) = k₂₁(q₁)+k₂₃(q₃)-k₁₂(q₂)-k₃₂(q₂)

d/dt(q₃) = k₃₂(q₂)-k₂₃ (q₃)

where G₁, G₂, G₃...G₉ and H₁, H₂, H₃...H₉ = f(k₁₂, k₂₁, k₃₂, k₂₃) and the initial conditions.

B.4