CC1C(OC(=O)CCC(=O)NC(C)(C)CO)O[C@H]2OC3(C)CC[C@H]4[C@H](C)CCC1C24OO3
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?