1,6,8-TRIMETHYL-1,2,3,6-TETRAHYDRODIPYRAZOLO[3,4-B:3,4-D]PYRIDIN-3-ONE;4,5-DIHYDRO-6-OXO-1,3,4-TRIMETHYLDIPYRAZOLO(3,4-B)(4,3-C)PYRIDINE
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