New natural saponins from fruits of Momordica grosvenori / 中草药

Objective To study the chemical constituents in the fruits of Momordica grosvenori. Methods Isolation and purification of the constituents were carried out on column chromatography. Their structures were identified by NMR and MS spectral analyses. Results Ten compounds were isolated and elucidated as kaempferol (Ⅰ), kaempferol 7-O-?-L-rhamnopyranoside (Ⅱ), kaempferitrin (Ⅲ), mogroside ⅡE (Ⅳ), mogroside Ⅲ (Ⅴ), kaempferol 3-O-?-L-rhamnopyranoside-7-O-[?-D-glucopyranosyl (1-2)-?-L-rhamnopyranoside] (Ⅵ), mogroside ⅣA (Ⅶ), grosmomoside Ⅰ (Ⅷ), mogroside Ⅴ (Ⅸ), and mogroside ⅡA1 (Ⅹ). Conclusion Compounds Ⅶ and Ⅹ are new natural products, and Ⅰ is isolated from the fruits of M. grosvenori for the first time.