COc1ccc(/C=C/C(=O)OCC(=O)N(C)c2c(N)n(Cc3ccccc3)c(=O)[nH]c2=O)cc1OC
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?