C=C[C@H]1CN2CCc3c([nH]c4c([C@H]5CCCN5C)c(O)ccc34)[C@@H]2C[C@@H]1C[C@H]1c2[nH]c3ccccc3c2CCN1C
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?