Cc1oc2cc3oc(=O)c(CCC(=O)N4C[C@@H]5C[C@H](C4)Cn4c5cccc4=O)c(C)c3cc2c1C
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?