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Chemical and Pharmaceutical Bulletin
Vol. 35 (1987) No. 7 P 2761-2773



Three new phenolic compounds, 3'-Ο-methylsappanol, 3'-Ο-methylepisappanol and 3'-Ο-methylbrazilin, were isolated from Sappan Lignum, the dried heartwood of Caesalpinia sappan. The absolute configurations of sappanol, episappanol, 3'-deoxysappanol, 3'-Ο-methylsappanol, 3'-Ο-methylepisappanol, brazilin and 3'-Ο-methylbrazilin were determined by means of Horeau's partial resolution method and chemical correlations.
Sappanol, episappanol, 3'-deoxysappanol, 3'-Ο-methylsappanol and 3'-Ο-methylepisappanol form a novel class of homoisoflavonoids.

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