Fuente: WIPO "tomato" The present invention provides a pure solid comprising flumetyl sulforim, wherein the solid comprises 4% or less by weight of compound(s) different than flumetyl sulforim (impurities) and having the crystalline polymorphic form exhibiting an XRPD pattern, having characteristic peaks at 5.3, 8.8, 10.7, 14.5, 18.0 °2θ ± 0.2 °2θ.