α and β-pipitzols isolated from the roots of Perezia cuernavacana and obtained by thermal rearrangement of perezone, (II), have been shown to be sesquiterpenes with structures IIIa and IVa related to cedrene (XXIII). The structure of perezinone has been revised and established as shown in formula XXVI.
从Perezia cuernavacana的根中分离出的α和β-pipitzols ,是通过perezone(II)的热重排获得的,是
倍半萜类,具有与
雪松烯(XXIII)有关的结构IIIa和IVa。如式XXVI所示,对佩雷西酮的结构进行了修改和确定。