A new 3-phenylcoumarin, indicanine A (1), has been isolated from the root bark of the African medicinal plant Erythrina indica, together with three known compounds, robustic acid (2), daidzein, and 8-prenyldaidzein. The structure of the new compound was characterized, as 4-hydroxy-5-methoxy-3-(4'-methoxyphenyl)-2" -(1-methylethenyl)dihydrofurano[4",5":6,7]coumarin by means of extensive spectroscopic analyses. The compounds were found to be devoid of in vitro antibacterial activity.
Erythrina Studies. Part 36. Indicanines B and C, Two Isoflavonoid Derivatives from the Root Bark of Erythrina indica.-The structures of indicanines B (I) and C (II), isolated in addition to two known isoflavones from the root bark of title species, are elucidated by spectroscopic analyses.Indicanin B shows in vitro antimicrobial activity against Staphylococcus aureus and mycobacterium smegmatis.-(WAFFO, ALAIN K.; AZEBAZE, GUY A.; NKENGFACK, AUGUSTIN E.; FOMUM, ZACHARIAS T.; MEYER, MICHELE; BODO, BERNARD; VAN HEERDEN, FANIE R.; Phytochemistry 53 (2000) 8, 981-985; Dep. Org. Chem., Univ. Yaounde, Yaounde, Cameroon; EN)
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