C=CCn1c(-c2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)cs/c1=N\C(P(=O)(O)O)P(=O)(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?