C[C@]12CCC3C(C1CC[C@@]2(O)C#Cc1ccc(CN)cc1)[C@@H](O)C=C1C[C@@H](O)CC[C@@]13C
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?