Phytochemistry p. 1093 - 1096 (1981)
Update date:2022-08-17
Topics:
Sankaram, Akella V. B.
Reddy, Vaddu V. Narayana
Sidhu, Gurbachan S.
Diosindigo A, diosindigo B and biramentaceone have been isolated from heartwood of Diospyros melanoxylon.A violet pigment isolated from the same source has been shown to be a new pentacyclic quinone.Sunlight causes diosindigo B to change to the pentacyclic quinone and biramentaceone.The intense peaks at m/e 389 and 388 in the mass spectrum of diosindigo B are doublets which arise by fragmentation of both M+ and M+ + 2.Key Word Index- Diospyros melanoxylon; Ebenaceae; naphthaquinones; diosindigo B; rearrangement; diosindigo A; biramentaceone.
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