O=C(CCN1C(=O)c2ccccc2C1=O)C1=NN[C@@H]2C(=O)N(c3ccc4c(c3)OCCO4)C(=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?