CO/N=C(/C(=O)N[C@@H]1C(=O)N2C(C(=O)O)=C(CSc3cnns3)CS[C@H]12)c1csc(N)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?