Br.CCOC(=O)c1c(CSC(=N)N)n(-c2ccc(Br)cc2)c2cc(Br)c(OC(C)=O)cc12
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?