COc1ccc(N(C(=O)c2snc(C(N)=O)c2N)C(C(=O)NCC2CCCO2)c2ccc3ncccc3c2)cc1OC
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?