COc1ccccc1C1SCC(=O)N1c1ccc(-c2ccc(-n3c(-c4ccccc4)nc4ccccc4c3=O)cc2)cc1
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?