allyl 3-benzyl-2-oxo-5-hexenoate
prop-2-enyl 3-benzyl-2-oxohex-5-enoate 3-benzyl-2-keto-hex-5-enoic acid allyl ester 3-benzyl-2-oxo-hex-5-enoic acid allyl ester
prop-2-enyl 3-benzyl-2-oxohex-5-enoat prop-2-enyle3-benzyl-2-oxohex-5-enoate プロプ-2-エニル=3-ベンジル-2-オキソヘx-5-エノアテ
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