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Sweet and bitter principles of the chinese plant drug bai yun shen revision of the assignment of the source plant and isolation of two new diterpene glycosides


Sweet and bitter principles of the chinese plant drug bai yun shen revision of the assignment of the source plant and isolation of two new diterpene glycosides



Chemical and Pharmaceutical Bulletin 33(10): 4275-4280



ISSN/ISBN: 0009-2363

DOI: 10.1248/cpb.33.4275

The assignment of the source plant of the Chinese plant drug "Bai-Yun-Shen" as Salvia digitaloides Diels (Labiatae), was revised to Phlomis betonicoides Diels of the same family. From roots of this plant, a sweet glycoside named phlomisoside-I (5) and a bitter glycoside named phlomisoside-II (6) were isolated. The aglycone of both compounds was proved to be baiyunol (7, furano-labdane-type diterpene), the aglycone of baiyunoside (1), which has already been isolated as the sweet principle from this plant drug. The structures of 5 and 6 were elucidated as the 3-O-.alpha.-rhamnopyranosyl-(1 .fwdarw. 2)-.beta.-glucopyranoside and the 3-O-sophoroside of 7, respectively.

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Accession: 006554960

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