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1-乙酰基-6-甲基二环2.2.1庚-4-烯
perf. 1-acetyl-6-methyl bicyclo2.2.1hept-4-ene
乙酰基-4-甲基二环2.2.1庚-4-烯
perf. 1-acetyl-4-methyl bicyclo2.2.1hept-4-ene