CCOC(=O)c1cc2c3c(c(O)c(OC)c2s1)N(C(=O)c1cc2c4c(c(O)c(OC)c2s1)N(C(C)=O)CC4)CC3
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?