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    氨气
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    乙酸乙酯
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    ethyl 2-acetyl-4,4,5,5-tetrafluoro-3-oxopentanoate
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    ethyl 2-acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxononanoate
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    乙酰乙酸乙酯
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