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Secoiridoid glucosides and unusual recyclized secoiridoid aglycones from Ligustrum vulgare

2009; Elsevier BV; Volume: 70; Issue: 17-18 Linguagem: Inglês

10.1016/j.phytochem.2009.09.009

1873-3700

Takao Tanahashi, Yukiko Takenaka, Naoaki Okazaki, Megumi Koge, Naotaka Nagakura, Toyoyuki Nishi,

Nephrotoxicity and Medicinal Plants

Phytochemical investigation of the dried leaves and twigs of Ligustrum vulgare has led to the isolation of the secoiridoid glucosides, (2′′R)- and (2′′S)-10-hydroxy-2′′-methoxyoleuropeins (1 and 2), and the secoiridoid aglycones, ligustrohemiacetals A (3) and B (4). Their structures were elucidated by spectroscopic and chemical means. Enzymatic hydrolysis of 10-hydroxyoleuropein to the analog of ligustrohemiacetals A and B led to the structural revision of jasmolactones.