CCC1=C(C=O)c2cc3[nH]c(cc4nc(c5c6[nH]c(cc1n2)c(C)c6C(=O)C5C(=O)OC)C(CCC(=O)OC)C4C)c(C)c3CC
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?