Journal
CARBOHYDRATE RESEARCH
Volume 346, Issue 8, Pages 1057-1060Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2011.03.025
Keywords
Stevia rebaudiana; Compositae; Asteraceae; Diterpenoid glycosides; NMR; MS
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From the commercial extract of the leaves of Stevia rebaudiana, two new diterpenoid glycosides were isolated besides the known steviol glycosides including stevioside, rebaudiosides A-F, rubusoside, and dulcoside A. The structures of the two new compounds were identified as 13-[(2-O-6-deoxy-beta-D-glucopyranosyl-beta-D-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid beta-D-glucopyranosyl ester (1), and 13-[(2-O-6-deoxy-beta-D-glucopyranosyl-3-O-beta-D-glucopyranosyl-beta-D-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid beta-O-glucopyranosyl ester (2), on the basis of extensive NMR and MS spectral data as well as chemical studies. (C) 2011 Elsevier Ltd. All rights reserved.
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