COc1ccc(C2C(C#N)=C(N)Oc3c2c(=O)oc2ccccc32)cc1Cn1cc([N+](=O)[O-])cn1
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?