O=C(NC1CCN(Cc2ccccc2)CC1)c1ccc(Cn2c(=O)c3ccccc3n(Cc3ccc(Cl)cc3)c2=O)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?