CC(C)(C)NC(=O)CC1C[C@H](C(=O)N2CCOCC2)[C@@]2(CCC3CCCC3)c3[nH]c4ccccc4c3CCN2C1=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?