C/C(=N\N=C(N)N)c1c(C(=O)OCCCCCCOC(=O)c2nc3sccn3c2/C(C)=N/N=C(N)N)nc2sccn12
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?