(organic chemistry) The diterpene glycoside (2S,4aR,6aR,7R,10aS,10bS)-2-(furan-3-yl)-6a,10b-dimethyl-7-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2,4a,5,6,7,10a-hexahydro-1H-benzo[f]isochromene-4,10-dione present in the wood of Tinospora cordifolia