CO[C@H]1ON=C(c2c(C)cc(C)cc2C)[C@@H]1C1(c2ccccc2)ON=C(c2c(C)cc(C)cc2C)O1
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?