COc1cc(C(=O)NC2CCc3cc(OC)c(OC)c(OC)c3-c3ccc(OC)c(=O)cc32)cc(OC)c1OC
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?