O=c1n(Cc2cc3c(cc2Cl)OCO3)c(=O)n2n1CC[C@H]1/C(=N\OCc3ccccc3)[C@H]3O[C@@H]3[C@@H](O)[C@@H]12
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?