protea cynaroides/glycoside

Isotachioside (1) and its related natural product 2 are isolated from Isotachis japonica and Protea neriifolia, respectively, and are categorized as analogs of arbutin (3), a tyrosinase inhibitor for practical use. Both of the natural products and several derivatives such as glucoside 4, xyloside 5,

The postharvesting disorder leaf blackening is the main cause of product rejection in Protea during export. In this study we report an investigation into metabolites associated with leaf blackening in Protea species. Methanol extracts of leaf and involucral bract tissue were analyzed by