C=CCn1c(SCC(=O)c2[nH]c(C)c(C(=O)OC)c2C)nc2scc(-c3ccc(OC)c(OC)c3)c2c1=O
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?