Avermectin derivatives having antiparasitic activity represented by the general formula (I) or salts thereof:
wherein -X----Y- represents -CH=CH-, -CH2-C(=O)-, -CH2-CH2-, or -CH2CH(R13)-; the line ---- between R1 and the carbon atom at the 4''-position represents a double bond and R1 represents (R11)(R12)C; or when -X----Y- represents -CH2-CH2-, the line ---- between R1 and the carbon atom at the 4''-position may represent a single bond and R1 represents a carboxymethyl group or a cyanomethyl group; and the line ---- between R2 and the carbon atom at the 5-position represents a single or a double bond.
具有抗寄生虫活性的
阿维菌素衍
生物,由通式 (I) 或其盐类代表:
其中 -X----Y- 代表 -CH=CH-、-
CH2-C(=O)-、- - -或 - CH(R13)-;R1 与位于 4''-位置的碳原子之间的线 ---- 代表双键,R1 代表 (R11)(R12)C;或当-X----Y-代表- - -时,R1 与 4''-位碳原子之间的连线 ---- 可代表单键,且 R1 代表羧甲基或
氰甲基;R2 与 5-位碳原子之间的连线 ---- 代表单键或双键。