.alpha.-Diazoacetophenone .omega.-Diazoacetophenone 2-Diazoacetophenone 3282-32-4 Acetophenone, 2-diazo- Diazoacetophenone Diazomethylphenyl ketone Ethanone, 2-diazo-1-phenyl- NSC25280 Phenyl diazomethyl ketone