D 1632 (OTTO) Diethyl 1,3-acetonedicarboxylate, 96% Cas 105-50-0 - used in the synthesis of novel pyrido[4,3,2-de]quinoline, isoquinolino[6,5,4,3-cde] quinoline and pyrazomycin. D 1632 (OTTO) Diethyl 1,3-acetonedicarboxylate, 96% Cas 105-50-0 - used as starting reagent in the synthesis of (±)-thienamycin, potent β-lactam antibiotic