Tetrahedron p. 2765 - 2770 (1985)
Update date:2022-08-05
Topics:
Talapatra, Sunil K.
Bose, Srabani
Mallik, Asok K.
Talapatra, Bani
Dendrobium gibsonii, an Orchidaceae plant yielded the first natural fluorenone derivatives designated dengibsin and dengibsinin to which 1,5-dihydroxy-7-methoxy-9-fluorenone (1) and 1,6-dihydroxy-5,7-dimethoxy-9-fluorenone (2) structures have been assigned respectively.The structures are fully supported by the 1H-NMR, IR, UV and MS spectral data of dengibsis and dengibsinin and a number of their pertinent derivatives.Aurantiamide acetate, dimethyl terephthalate and β-sitosterol have been isolated as the other constituents.
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