CCOC(=O)N1C2=NC(C(=O)OC)=C(C(=O)OC)[C@@H]3N(C)c4ccc(OC)cc4[C@]23C[C@H]1C(=O)OC
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?