COc1cc(C2CC(=O)Oc3c(C(CCN4CCN(c5ccccc5)CC4)c4ccc(N(C)C)cc4)c(OC)cc(OC)c32)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?