COc1cc(N(Cc2ccc3oc(=O)c(-c4ccccc4)nc3c2)Cc2ccc3oc(=O)c(-c4ccccc4)nc3c2)cc(OC)c1OC
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?