CN1C(=O)C2(Cc3cn(C45CC67SSC(CO)(C(=O)N6C4Nc4ccccc45)N(C)C7=O)c4ccccc34)SSC1(CO)C(=O)N2C
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?