A negatively charged reactive species formed during a reaction.
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3-benzoyl-2,6-dimethyl-4H-1-benzopyran-4-one
Diphenylmethyl-dichlormethyl-sulfon
3-Hydroxy-3-methyl-4-phenylmercapto-buten
Methanamine, N-(1-phenylethylidene)-, (E)-