COc1ccc2c(c1)C(=O)[C@H](OC(=O)Nc1ccc(C)c(Br)c1)[C@@H](c1ccc(OC)c(Br)c1)O2
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?