CCC(C)[C@H](N)C(=O)N[C@H]1CCC2C3CC=C4C[C@@H](O)CC[C@]4(C)C3CC[C@@]21C
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?