k1 = V1 k2 = V3 k3 = VM1 k4 = V2 k5 = VM3 k6 = V4 k7 = Kc k8 = vi k9 = vd k10 = Kd k11 = K1 k12 = K2 k13 = K3 k14 = K4 k15 = kd k16 = compartment