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2,6,6-三甲基-2-环己烯-1,4-二酮
perf. 2,6,6-trimethylcyclohex-2-ene-1,4-dione
3,5,5-三甲基-2-环己烯-1,4-二酮
perf. 2,6,6-trimethylcyclohex-2-ene-1,4-dione