Ochnabianthrone; a trans-9,9’-bianthrone from O

Author(s): Sibanda S, Nyamira C, Nicoletti M, Galeffi C


(−)-trans-2,2′-Digeranyloxy-7,7′-dimethyl-4,4′,5,5′-tetrahydroxy-9,9′-bianthrone, (−)-ochnabianthrone, was isolated from the root bark of Ochna pulchra. The circular dichroism curve and therefore the absolute configuration at 9,9′ (R,R′ or S,S′) is similar to that of (−)-sennidin A1.

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