A resonance-stabilized anionic form of the enol tautomer, which is often involved in nucleophilic addition reactions.
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(2S,3R)-2,6,6-Trimethyl-5-oxo-3-phenyl-heptanoic acid tert-butyl ester
Benzenemethanamine, a-[(1,1-dimethylethoxy)methyl]-N-(1-methylethyl)-, (R)-
Benzoic acid (1R,4R)-4-hydroxy-1,5-dimethyl-2-oxo-hexyl ester
3-[(1′-hydroxy-1′-(2″-nitrophenyl))methyl]-tetrahydropyran-4-one
(1'S,6R)-1-benzyloxycarbonyl-3-(1'-phenyleth-1'-yl)-6-methylperihydropyrimidin-4-one