A new arborinane-type triterpenoid glycoside and three known megastigmanes from the roots of Cyathula officinalis KCKuan

In this phytochemical study, a novel arborinane-type triterpenoid glycoside (1) and three known megastigmanes (2-4) were isolated from the dried roots of Cyathula officinalis K.C.Kuan. The structures of these compounds were elucidated using NMR spectroscopy. This is the first report of arborinane-type triterpenoids in the Amar-anthaceae family. Among these known megastigmanes, compound 3 was isolated from the Amaranthaceae family for the first time, while compounds 2 and 4 were first reported from the Cyathula genus. The chemo-taxonomic significance of these compounds is discussed.