Cc1c(C)c2c(OCC(=O)N3CCC[C@H]3C(=O)O)cc3c(c2oc1=O)CCC(C)(C)O3
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?