Structures of new acylated oleanene-type triterpene oligoglycosides, theasaponin E1 and E2, from the seeds of tea plant, Camellia sinesis (L.) O.

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  • Structures of New Acylated Oleanene-Type Triterpene Oligoglycosides, Theasaponins E1 and E2, from the Seeds of Tea Plant, Camellia sinensis (L.) O. KUNTZE.
  • Structures of New Acylated Oleanene-Typ

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Two new acylated oleanene-type triterpene oligoglycosides, theasaponins E1 and E2, were isolated from the seeds ofb tea plant [Camellia sinensis (L.) O. KUNTZE]. The structures of theasaponins E1 and E2 were elucidated on the basis of chemical and physiochemical evidence to be expressed as 21-O-angeloyl-22-O-acetyltheasapogenol E 3-O-[β-D-galactopyranosyl (1→2)][β-D-xylopyranosyl](1→2)-α-L-arabinopyranosyl (1→3)]-β-D-glucopyranosiduronic acid and 21-O-angeloyl-28-O-acetyltheasapogenol E 3-O-[β-D-galactopyranosyl (1→2)] [β-D-xylopyranosyl (1→2)-α-L-arabinopyranosyl (1→3)]-β-D-glucopyranosiduronic acid, respectively. Theasaponin E1 was found to show antisweet activity.

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