CC(C)(C)OC(=O)N1CCC(c2c(C(=O)Nc3ccc4c(c3)OCCO4)cnn2-c2ccc(Cl)cc2)CC1
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?