Previously undescribed pyridyl-steroidal glycoalkaloids and 23S,26R-hydroxylated spirostanoid saponin from the fruits of Solanum violaceum ortega and their bioactivities
作者:Joseph Sakah Kaunda、Xu-Jie Qin、Hong-Tao Zhu、Dong Wang、Chong-Ren Yang、Ying-Jun Zhang
DOI:10.1016/j.phytochem.2021.112656
日期:2021.4
(1S,2S)-1-(4-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-[(2S,3R,4R)-tetrahydro-4-[(4-hydroxy-3-methoxyphenyl)methyl]-3-(hydroxymethyl)-2-furanyl]phenoxy]-1,3-propanediol were evaluated for their cytotoxic and antibacterial activities. (1S,2S)-1-(4-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-[(2S,3R,4R)-tetrahydro-4-[(4-hydroxy-3-methoxyphenyl)methyl]-3-(hydroxymethyl)-2-furanyl]phenoxy]-1,3-propanediol showed
从茄果苷A‒C的酸水解中分离出三种先前未描述的吡啶基-甾族糖苷生物碱,茄苷A‒C,一种稀有的23 S,26 R-羟基螺螺旋甾体皂苷和两种甾体生物碱苷元,茄苷A和B。茄果的果实,以及五个已知的类似物,包括两个罕见的甾体糖苷,两个木脂素和一个二萜。在结构上,它们包括16 β -甲氧基- 23-脱氧22,26-epimino -胆甾型骨架部分,和一个16 β-甲氧基-3,23-二脱氧-22,26-表皮胆固醇-3,5-二烯衍生物。迄今为止尚未描述的结构是在广泛的光谱分析的基础上建立的。糖部分的构型通过化学衍生来解决。Solanindiosides A-C,(22 - [R,23小号,25 - [R 26 - [R)-spirost -5-烯-3- β,-23,26- triol3- ø - β - d -xylopyranosyl-(1→3) - β - d-吡喃葡萄糖苷,茄苷A和B以及(1 S,2