CCC(NC(=O)CCc1c(C)c2cc3c(C)c(C)oc3cc2oc1=O)C(=O)N[C@@H](Cc1ccccc1)C(=O)O
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?