COC(=O)c1cc2c3c(cc(NCCN)c2[nH]1)N(C(=O)c1cc2cc(OC)c(OC)c(OC)c2[nH]1)CC3CCl.Cl
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?