| 摘要 |
Novel compounds of the formula <IMAGE> I wherein: the symbols R1, R2, R4, R5 and R6 represent hydrogen or methyl, with the proviso that only one of R1, R2 and R4 represents methyl, and, when either or both R5 and R6 represent methyl, then R1, R2 and R4 represent hydrogen; and, either the symbol (=O) on the carbon designated by the number 1 or the symbol (=O) on the carbon designated by the number 3, represents a keto group, such that when the group is present on carbon 1, then carbon 3 may contain a methyl group. and their use as odorants are described.
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