Pharmacognostic Studies on Ginger and Related Drugs (part 2): Constituents of Zingiberis Processum Rhizome (Kankyo)

Nineteen compounds has been isolated from the 80% methanolic extract of Kankyo (Japanese name for Zingiberis processum rhizome) made out of ginger, including a glucoside of 6－gingerdiol (15), four diarylheptanoids (16-19) and the sulfonated compounds such as 6－gingesulfonic acid (10) and shogasulfonic acid A (12) previously reported, besides twelve known compounds. This is the first isolation of compounds 15-19 from the Kankyo. In addition, interestingly, two kinds of Kankyo are found to be sold in the Japanese market: one contains sulfonated derivatives and the other contains no such compound