Monk fruit extract has been approved as a natural sweetener by many countries. Its major sweet components, mogrosides, display different sweet intensities and profiles. Therefore, it is important to understand the change of mogroside contents in Siraitia grosvenorii at different maturity stages. In this study, monk fruit cultivars were collected from 4 locations in GuangXi, GuiZhou, and HuNan, at different times. Mogroside IIe, mogroside III, mogroside IIIe, mogroside IV, mogroside V, isomogroside V, and siamenoside I in each sample were quantified using high performance liquid chromatography coupled to triple quadrupole mass spectrometer (LC-MS-MS). As a result, mogroside IIe was the major component at the early maturity stage. It is converted to mogroside III from 15 to 45 days, then continued the glycosylation rapidly to yield mogroside V which kept predominant after 60 days. Highly glycosylated mogrosides, such as mogroside V and siamenoside I, which provide a better taste profile, accumulated and stabilized from 75 to 90 days. It is recommended to harvest the fruit after 75 days of pollination.
Two new alkaloids, 4'-O-demethylhamatine (1) and ancistrotectoriline C (2), were isolated from the stems and leaves of Ancistrocladus tectorius. These two compounds represent one 5,1'-coupled and one 7,6'-coupled naphthylisoquinoline alkaloid, respectively. Their structures were elucidated by 1D- and 2D-NMR spectra and other spectroscopic studies.
Dihydrochalcone class of compounds displays good performance in taste modulation on several natural non-caloric/low-caloric sweeteners. Compounds such as hesperetin dihydrochalcone (HDC) and hesperetin dihydrochalcone-4′- O-β-d-glucoside (HDCG) were reported to be found in nature. However, the evidence was not complete to support their natural presence. The Coca-Cola Company has been working on the identification of natural sources of reported dihydrochalcones, as well as the exploration of new natural dihydrochalcones. During the investigation on plant Balanophora harlandii, the natural presence of HDCG was confirmed, and 3 new analogs have been identified. In this paper, detailed structural elucidation of known HDCG and 3 new analogs have been described.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.