COc1ccc(N2CCN(C(=O)c3ccc4c(=O)n(Cc5ccc6c(c5)OCO6)c(=O)[nH]c4c3)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?