CCC1(CC)C(=O)C2=C3C1[C@H](C(=O)OC)C=C(C(=O)OC)C[C@H]3n1c(=O)n(-c3ccccc3)c(=O)n1[C@H]2C
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?