CCOC(=O)C1=C(c2ccccc2)N=c2s/c(=C\c3ccc(O)cc3)c(=O)n2C1c1cccs1
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?