CCC(C)C(=O)c1c(O)c(C)c2oc3c(C)c(O)c(C(=O)C(C)CC)c(O)c3c2c1O
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?