COc1cc(C(CCN2CCCC(C)C2)c2c(OC)cc(OC)c3c2OC(=O)CC3c2ccc(N(C)C)cc2)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?