Cc1oc2c(c(C)cc3oc(=O)c(CC(=O)N[C@@H](CC(C)C)C(=O)O)c(C)c32)c1C
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?