O=c1[nH]c(=S)c2cc3c(=S)[nH]c(=O)n(CCC(c4ccccc4)(c4ccccc4)c4ccccc4)c3nc2n1CCC(c1ccccc1)(c1ccccc1)c1ccccc1
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?