CC(C)(C)C1CCC2c3c([nH]c4ccccc34)C3C(=O)N(c4ccc5c(c4)C(=O)c4ccccc4C5=O)C(=O)C3C2C1
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?