COc1ccc(CCNC(=O)CCc2c(C)nc3c(c(C)nn3-c3ccc(C)c(C)c3)c2C)c(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?