CCCc1nn2c(O)c(C(c3cccc(Cl)c3)c3c(O)n4nc(CCC)sc4nc3=O)c(=O)nc2s1
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?