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(1989)1,4-dimethyl-1-<5-(dimethylphenylsilyl)-3-<(methylsulfonyl)oxy>-1-methyl-2-oxocyclopentyl>-4-hydroxy-2-cyclohexene
4-<5-(dimethylphenylsilyl)-3-<(methylsulfonyl)oxy>-1-methyl-2-oxocyclopentyl>-4-methylcyclohex-2-en-1-one
1,4-dimethyl-1-<5-(dimethylphenylsilyl)-3-<(methylsulfonyl)oxy>-1-methyl-2-oxocyclopentyl>-3-cyclohexen-2-one