CC(=O)Oc1cc2c(cc1OC(C)=O)C1(C)CCC2(C)c2cc(OC(C)=O)c(OC(C)=O)cc21
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?