The glycosylation of capsaicin and 8-nordihydrocapsaicin was investigated using cultured cells of Catharanthus roseus. In addition to
capsaicin 4-O-b-D-glucopyranoside (170 lg/g fr. wt of cells), the biotransformation products, capsaicin 4-O-(6-O-b-D-xylopyranosyl)-b-
D-glucopyranoside (116 lg/g fr. wt of cells) and capsaicin 4-O-(6-O-a-L-arabinopyranosyl)-b-D-glucopyranoside (83 lg/g fr. wt of cells),
were isolated from the cell suspension after three days of incubation with capsaicin. Two other compounds, 8-nordihydrocapsaicin 4-O-
(6-O-b-D-xylopyranosyl)-b-D-glucopyranoside (171 lg/g fr. wt of cells) and 8-nordihydrocapsaicin 4-O-(6-O-a-L-arabinopyranosyl)-b-D-
glucopyranoside (122 lg/g fr. wt of cells), together with the known 8-nordihydrocapsaicin 4-O-b-D-glucopyranoside (204 lg/g fr. wt of
cells) were also isolated from the cell suspension after incubation with 8-nordihydrocapsaicin.
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