2-Amino-4-oxo-6-acetyl-7,8-dihydro-3H,9H-pyrimidodiazepine 4H-Pyrimido(4,5-b)(1,4)diazepin-4-one, 6-acetyl-2-amino-1,7,8,9-tetrahydro- 6-Acetyldihydrohomopterin 6-Acetylhomopterin 80003-63-0 Aoadpd Quench spot