k1 = sn
k2 = dn
k3 = alpha_n
k4 = alpha_e
k5 = de
k6 = gamma_e
k7 = Cmax
k8 = rc
k9 = dc
k10 = gamma_c
k11 = kn
k12 = eta
k13 = COMpartment
k14 = Source
k15 = Sink