O=C(C[C@H]1C[C@H](C(=O)N2CCOCC2)[C@@]2(CCC3CCCC3)c3[nH]c4cc(-c5ccco5)ccc4c3CCN2C1=O)NCCC1=CCCCC1
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?