CCOC(=O)c1c(-n2c(C)cc(/C=C3/C(=O)NC(=O)N(CC)C3=O)c2C)sc2c1CCCC2
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?