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A minor, sweet cucurbitane glycoside from Siraitia grosvenorii

机译:罗汉果(Siraitia grosvenorii)的次要甜南瓜碱

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摘要

A minor, sweet cucurbitane-glycoside, named iso-mogroside V (1), was isolated from Luo Han Guo (Siraitia grosvenorii (Swingle) C. Jeffery) along with five previously reported mogrosides. The structure of iso-mogroside V, 3-[(4-O-β-D-glucopyranosyl-β-D-glucopyranosyl)oxy]-mogrol-24-O-β- D-glucopyranosyl-(1→2)-O-[β-D-glucopyranosyl-(1→6)] β-Dglucopyranoside, was established on the basis of extensive 2D-NMR (COSY, TOCSY, NOESY, HSQC, and HMBC) and LCMS analyses. The five known mogrosides were identified as mogroside V (2), 11-oxo-mogroside V (3), siamenoside I (4), mogrosides IVa (5) and IVe (6). Iso-mogroside V was determined to be approximately 500 times sweeter than 0.5% (w/v) sucrose.
机译:从罗汉果(Siraitia grosvenorii(Swingle)C. Jeffery)中分离了一种次要的甜瓜氨酸糖苷,称为异罗汉果苷V(1)以及先前报道的五种罗汉果苷。异罗汉果苷V,3-[(4-O-β-D-吡喃葡萄糖基-β-D-吡喃葡萄糖基)氧基]-mogrol-24-O-β-D-吡喃葡萄糖基-(1→2)-O的结构-[β-D-吡喃葡萄糖基-(1→6)]β-吡喃葡萄糖苷是在广泛的2D-NMR(COSY,TOCSY,NOESY,HSQC和HMBC)和LCMS分析的基础上建立的。五种已知的罗汉果苷被鉴定为罗汉果苷V(2),11-氧代罗汉果苷V(3),决明子苷I(4),罗汉果苷IVa(5)和IVe(6)。经测定,异罗汉果苷V的甜度约为0.5%(w / v)蔗糖的500倍。

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