Compounds of formula (I): ##STR1## wherein R.sup.1 is hydrogen or optionally protected hydroxy; R.sup.2 is alkoxy, optionally protected hydroxy, oxo or optionally O-substituted oximino; R.sup.3 is hydrogen, optionally protected hydroxy, or a group 4'-(.alpha.-L-oleandrosyl)-.alpha.-L-oleandrosyloxy or .alpha.-L-oleandrosyloxy wherein the terminal hydroxy group is optionally protected; one or R.sup.4 and R.sup.5 is hydrogen and the other is methyl; and one of R.sup.6 and R.sup.7 is hydrogen and the other is methyl; with the proviso that (a) when R.sup.1 is optionally protected hydroxy, R.sup.3 is hydrogen, and (b) when R.sup.2 is not methoxy or optionally protected hydroxy, R.sup.1 and R.sup.3 are both hydrogen, are new and useful as anthelmintic agents.
化合物的公式(I):##STR1## 其中R.sup.1为氢或可选择保护的羟基;R.sup.2为烷氧基,可选择保护的羟基,氧代或可选择O-取代的
肟基;R.sup.3为氢,可选择保护的羟基,或者4'-(.alpha.-L-oleandrosyl)-.alpha.-L-oleandrosyloxy或.alpha.-L-oleandrosyloxy基团,其中末端羟基可选择保护;R.sup.4和R.sup.5中的一个为氢,另一个为甲基;R.sup.6和R.sup.7中的一个为氢,另一个为甲基;但有条件(a)当R.sup.1为可选择保护的羟基,R.sup.3为氢,和(b)当R.sup.2不为甲氧基或可选择保护的羟基时,R.sup.1和R.sup.3都为氢。这些化合物作为驱虫剂是新的和有用的。