COc1cc(C(CCN2CCN(c3ccccc3)CC2)c2c(OC)cc(OC)c3ccc(=O)oc23)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?