title: Structures of the novel diterpene glycosides from Stevia rebaudiana.
abstract: 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-β-d-glucopyranosyl-β-d-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid β-d-glucopyranosyl ester (1), and 13-[(2-O-6-deoxy-β-d-glucopyranosyl-3-O-β-d-glucopyranosyl-β-d-glucopyranosyl)oxy] ent-kaur-16-en-19-oic acid β-d-glucopyranosyl ester (2), on the basis of extensive NMR and MS spectral data as well as chemical studies.
authors.affiliation: The Coca-Cola Company, Organic Chemistry Department, Research and Technology, One Coca-Cola Plaza, Atlanta, GA 30313, USA. vchaturvedula@na.ko.com
authors.forename: Venkata Sai Prakash
authors.initials: VS
authors.lastname: Chaturvedula
authors.forename: Indra
authors.initials: I
authors.lastname: Prakash
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D036625:Stevia / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D006027:Glycosides