COCCCNC(=O)C[C@H]1C[C@H](C(=O)N2CCOCC2)[C@@]2(C)c3[nH]c4cc(-c5ccco5)ccc4c3CCN2C1=O
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?