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-α-rhamnopyranosyl-(1→2)-β-glucopyranoside and the 3-O-sophoroside of 7, respectively.
将中国植物药 "白云参 "的来源植物定为唇形科植物丹参(Salvia digitaloides DIELS),并修正为同科植物白云参(Phlomis betonicoides DIELS)。从该植物的根中分离出了一种名为 phlomisoside-I (5) 的甜苷和一种名为 phlomisoside-II (6) 的苦苷。经证实,这两种化合物的苷元都是白云醇(7,
呋喃-唇丹型二萜),即白云苷(1)的苷元。5 和 6 的结构已被阐明,分别为 3-O-α-rhamnopyranosyl-(1→2)-β-glucopyranoside 和 7 的 3-O-sophoroside 。