Cloning and sequence analysis of Farnesyl pyrophosphate synthase gene in Siraitia grosvenorii Determination of mogroside V and 11-oxomogroside V in dried mature fruits of Momordica grosvenori by HPLC Stability of mogroside V in artificial gastric juice and its metabolism in vitro Cloning and sequence analysis of Farnesyl pyrophosphate synthase gene in Siraitia grosvenorii