CCOc1ccc(NC(=O)Cn2c(=O)n(-c3cccc(OC)c3)c(=O)c3c4c(sc32)CCCC4)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?