COC(=O)C1=C(C)N(Cc2ccccc2)[C@]23O[C@](C(=O)OC)(C(=O)N2C1c1ccccc1)C1CCOC(=O)C13
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?