COc1cc(C(CCN2CCCC2)c2c(OC)cc(OC)c3c2OC(=O)CC3c2ccc(N(C)C)cc2)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?