COc1ccc(-c2oc3ccc(-c4cc(OC)c(OC)c(OC)c4)cc3c2C(=O)c2ccc(OC)nc2)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?