O=C1N(CN2CCOCC2)CN(CN2CCOCC2)C(=O)N1Cc1ccc(-c2ccc(CN3C(=O)N(CN4CCOCC4)CN(CN4CCOCC4)C3=O)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?