CC1(C)OC[C@H]([C@H]2OC(C)(C)O[C@@H]2[C@H](O)c2nnc3ccc(Cl)nn23)O1
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?