Diterpene glycosides from leaves of chinese rubus chingii and fruits of R. suavissimus, and identification of the source plant of the chinese folk medicine "Fu-pen-zi".

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Abstract
Five diterpene glycosides, goshonoside-F1, -F2, -F3, -F4 and -F5 (4-8), which are characteristic of the leaves of Japanese R. chingii (Gosho-ichigo), were isolated from the leaves of Chinese R. chingii (Zhan-yei fu-pen-si). This proved the chemotaxonomical identity of the plants. Compound 8 was also detected in commercial Chinese folk medicine, Fu-pen-zi, indicating that the source plant of this drug is R. chingii. Rubusoside (1), which is the sweet diterpene glycoside of the leaves of R. suavissimus (Chinese name: Gan-yei xuen-gou-zi), was also identified in fruits of the plant.