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Abstract:
Optically pure(+)-(4S,4aS,8aS)-1,2,3,4,4a,5,8,8a-octahydro-4,8a-dimethylnaphthalen-4a-ol ((+)-1; dehydrogeosmin) is released from flower heads of the two cactaceae Rebutia marsoneri and Dolichothele sphaerica. The absolute configuration of (+)-1 is iden