CCCCCCCCC/C=C/C=C/C(=O)NCC(=O)NC1C(O)C(O)C(Nc2ncnc3[nH]cnc23)OC1C(O)CO
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?