diazomethane
[(1R,2R)-2-((1R,6R,8aR)-1-Furan-3-yl-5,8a-dimethyl-3-oxo-3,4,6,7,8,8a-hexahydro-1H-isochromen-6-yl)-2,6,6-trimethyl-5-oxo-cyclohex-3-enyl]-acetic acid
(1R,4bR,6aR,10aS,10bR,12aR)-1-Furan-3-yl-4b,7,7,10a,12a-pentamethyl-1,6a,7,10a,10b,11,12,12a-octahydro-4bH,6H-2-oxa-chrysene-3,5,8-trione
7-deacetoxy-7-oxogedunin