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Cucurbitacin glycosides from Cabeça-de-negro

1995; Elsevier BV; Volume: 39; Issue: 1 Linguagem: Português

10.1016/0031-9422(94)00869-u

1873-3700

Kimiko Nakano, Yuu Kanai, Kōtarō Murakami, Yoshihisa Takaishi,

Antioxidant Activity and Oxidative Stress

Five cucurbitacin glycosides named cabenosides D-L were isolated from 'Cabeça-de-negro', the roots of Caput nigri. Among them, the structures of cabenosides D-H were elucidated as 10α-cucurbit-5-en-11-oxo-3β,24R,25-triol-3-O-β-d-glucopyranoside, 10α-cucurbit-5-en-24-oxo-3β,11α,25-triol-25-O-β-d-glucopyranosyl, [3,O-β-d-glucopyranoside, 3-O-β-d-glucopyranosyl-(1–2)-β-d-glucopyranoside3-O-β-d-glucopyranosyl-(1–6)-β-d-glucopyranoside] and 10α-cucurbit-5-en-11,24-dioxo-3β,25-diol-25-O-β-d-glucopyranosyl, 3-O-β-d-glucopyranosyl-(1–6)-β-d-glucopyranoside, respectively, on the basis of chemical and spectral evidence.