CCOC(=O)c1c(C)nc2sc3c(=O)n(-c4ccc(OC)cc4)nnc3c2c1-c1ccc(OC)cc1
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?