| Structure Identification: |
| Chemical & Pharmaceutical Bulletin, 1983 , 31 (11) :3971-83. | | Studies on the constituents of Asclepiadaceae plants. LVI. Isolation of new antitumor-active glycosides from Dregea volubilis (L.) BENTH.[Reference: WebLink] | Seven new glycosides were isolated from the stem of Dregea volubilis (L.) BENTH.
METHODS AND RESULTS:
The structures of dregeoside Ap1 (1), dregeoside Ao1 (2), dregeoside Aa1 (3), Dregeoside A11 (4), dregeoside C11 (5), dregeoside Ka1 (6), and dregeoside Ka1 (7) were deduced on the basis of chemical and spectral evidence as drevogenin A 3-O-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, drevogenin A 3-O-β-D-glucopyranosyl-(1→4)-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, drevogenin A 3-O-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, drevogenin A 3-O-β-D-glucopyranosyl-(1→4)-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, drevogenin C 3-O-β-D-glucopyranosyl-(1→4)-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, drebyssogenin K2 3-O-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-oleandropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, and drebyssogenin K2 3-O-3-O-methyl-6-deoxy-β-D-allopyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-β-D-cymaropyranoside, respectively.
CONCLUSIONS:
Among them, 1 and 2 were active against Ehrlich carcinoma (solid type), and the latter was also active against melanoma B-16. |
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