Cl.O[C@]12C=C(c3nccc4c3[nH]c3ccccc34)[C@@H]3CCN(CCCC/C=C\CC1)C[C@@]31CC3/C=C\CCCCN3[C@@H]21
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?