α-Santonin was converted to 2,6-dimethyl-6-(8-methyl-4-methylene-7-nonenyl)-2-cyclohexene-1-methanols (1a and 1b). Both spectral data of 1a and 1b were found to be different from those reported for magydar-2,10(20),13-trien-17-ol, a diterpene isolated from Magydaris panacifolia (Vahl) Lange. This indicates that the structure of the natural diterpene should be revised; the structure was later revised to t-6-hydroxymethyl-1, t-3-dimethyl-t-2-(3-methyl-2-butenyl)-3-(4-methyl-3-pentenyl)-r-1-cyclohexanol.
α-Santonin 被转化为 2,6-二甲基-6-(8-甲基-4-亚甲基-7-
壬烯基)-
2-环己烯-1-甲醇(1a 和 1b)。研究发现,1a 和 1b 的光谱数据均不同于从 Magydaris panacifolia (Vahl) Lange 分离出来的一种二萜--magydar-2,10(20),13-
三烯-17-醇的光谱数据。这表明天然二萜的结构应予以修正;后来,该结构被修正为 t-6-羟甲基-1, t-3-二甲基-t-2-(3-甲基-
2-丁烯基)-3-(4-甲基-3-
戊烯基)-r-1-
环己醇。