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Coumarin glucosides, esculin (1) and scopolin (2), were isolated from the bark of Olea africana MILL. (O. europaea L. subsp. africana (MILL.) GREEN) while isoscopoletin-β-D-glucoside (magnolioside) (3) was isolated from the bark of Olea capensis L. The secoiridoid glucoside oleuropein (4) was also isolated from both species.
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Tsukamoto et al. (1985) studied this question.
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