O=C(NCC1CCCO1)C(c1ccncc1)N(Cc1cccs1)C(=O)Cn1nnc(-c2ccc(F)cc2)n1
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?