Toxin, essential for pathogenicity. Causes symptoms of Corynespora leaf fall disease (CLF) in rubber trees, including chlorosis, development of brown spots and necrosis. Alters leaf cell ultrastructure, causing plasmolysis in most cell types. In extreme cases the plasmolysis leads to disruption of the plasma membrane. Also affects chloroplast structure, causing lamellae distortion and reduced thylakoids stacking together. Causes accumulation of starch grains. Does not affect the nucleus or mitochondria. Toxic to N.tabacum, L.esculentum, S.ionantha, F.lyrata, P.violacea, S.melongena, and G.max. Not toxic to P.alba, G.hirsutum, P.acerifolia, R.pseudoacacia, T.zebrina, M.alba, and Q.ilex. O-glycosylated with 3-O-methyl-O-alpha-D-mannopyranosyl.