Two newditerpenes, sideridiol C20H32O2 and siderol C22H34O3 were extracted from the corols of Sideritis sicula Ucria (Fam. Labiatae). Their structures were elucidated as I and IX, respectively, and the absolute configuration was proved to be related to (−)-isokaurene.
从Sideritis sicula Ucria(Fam。Labiatae)的提取物中提取了两个新的二萜,铁三糖醇C 20 H 32 O 2和铁氧烷C 22 H 34 O 3。它们的结构分别被阐明为I和IX,并且绝对构型被证明与(-)-异kaurene有关。
Abstract Siderone, a new keto-diterpene, has been isolated from the petrol extract of the inflorescence of Sideritis syriaca . Its structure and stereochemis