.alpha.,.alpha.-Diethoxyacetophenone 2,2-Diethoxy-1-phenylethanone 2,2-Diethoxyacetophenone 6175-45-7 Ethanone, 2,2-diethoxy-1-phenyl- Glyoxal, phenyl-, 2-(diethyl acetal) NSC66180 Phenylglyoxal diethyl acetal