Structure of a New Antioxidative Phenolic Diterpene Isolated from Rosemary (<i>Rosmarinus officinalis</i>L.)
Reiko InataniDepartment of Food and Nutrition, Faculty of Science of Living, Osaka City University, Sumiyoshi-ku, Osaka 558, JapanNobuji NakataniDepartment of Food and Nutrition, Faculty of Science of Living, Osaka City University, Sumiyoshi-ku, Osaka 558, JapanHidetsugu FUWADepartment of Food and Nutrition, Faculty of Science of Living, Osaka City University, Sumiyoshi-ku, Osaka 558, JapanHaruo SetoInstitute of Applied Microbiology, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
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A new antioxidant, phenolic diterpene, named rosmanol, was isolated from the leaves of rosemary (Rosmarinus officinalis L.). Its structure has been determined as 7β,11,12-trihydroxy-6,10-(epoxymethano)abieta-8,11,13-trien-20-one on the basis of chemical and spectroscopic evidence. In addition, all the protons of rosmanol (II) as well as carnosol (I), including the methylene protons of the A ring, were analyzed by 400 MHz 1-NMR.
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