Cc1nn(Cc2ccccc2Cl)c(C)c1C(=O)NCCN1C(=O)S/C(=C\c2ccccc2)C1=O
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?