k1 = a1
k2 = a4
k3 = d1
k4 = d2
k5 = d3
k6 = c1
k7 = c3
k8 = c2
k9 = c4
k10 = k
k11 = k1
k12 = k2
k13 = k3
k14 = k4
k15 = alpha
k16 = p
k17 = n
k18 = gamma
k19 = d
k20 = compartment