CCOC(=O)c1c(N2CCCC2)[nH]c(=O)c(C(c2ccc(Cl)c([N+](=O)[O-])c2)c2c(O)c(C(=O)OCC)c(N3CCCC3)[nH]c2=O)c1O
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?