diethyl (2-methyl-5-oxo-1-cyclopenten-1-yl)methylphosphonate
2-(diethoxyphosphorylmethyl)-3-methylcyclopent-2-en-1-one 2-(diethoxyphosphoryl-methyl)-3-methyl-cyclopent-2-en-1-one 2-(diethoxyphosphorylmethyl)-3-methyl-cyclopent-2-en-1-one
2-(diethoxyphosphorylmethyl)-3-methylcyclopent-2-en-1-on 2-(diéthoxyphosphorylméthyl)-3-méthylcyclopent-2-en-1-one 2-(ジエトキシホスホリルメチル)-3-メチルシクロペント-2-エ̏
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