CCNC(=O)O/N=C1\CCC2[C@@H]3CC=C4C[C@@H](OC5CCCCO5)CC[C@]4(C)C3CC[C@]12C
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?