Abstract：
:The major vacuolar flavonoid of a greenhouse-grown plant of Becium grandiflorum has been identified as the 8-O-glucoside of isothymusin (5,8,4'-trihydroxy-6,7-dimethoxyflavone), while the major external flavonoids in the diethyl ether surface wash of the same plant are found to be isothymusin and cirsimaritin (5,4'-dihydroxy-7,8-dimethoxyflavone). Although isothymusin is already known as a conversion product of thymusin (5,6,4'-trihydroxy-6,7-dimethoxyflavone) formed by means of the Wessely-Moser rearrangement, this is the first report of isothymusin as a plant constituent, both as aglycone and glycoside. The biogenetic and chemotaxonomic implications of the occurrence of these flavonoids in B.grandiflorum are briefly discussed.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Grayer RJ,Veitch NCdoi
10.1016/s0031-9422(97)00626-2subject
Has Abstractpub_date
1998-03-01 00:00:00pages
779-82issue
5eissn
0031-9422issn
1873-3700pii
S0031942297006262journal_volume
47pub_type
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