Cc1ccc2c(c1)CC1(C2=O)[C@H](c2ccccc2)C2C(=O)c3ccc(C)cc3C2[C@H]1c1ccccc1
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?