1,4-naphthoquinone derivates represented by the following general formula:
wherein R1 represents a hydrogen atom, a hydroxy group, a lower alkoxy group or an arylthio group, R2 represents a carboxy group, an esterified carboxy group or an amidated carboxy qroup or, when taken toqether, R1 and R2 form a group of
represents a hydrogen atom or a lower alkyl group, R4 represents a lower alkyl group, R5 represents a hydrogen atom or a halogen atom, and R6 represents a hydrogen atom, a lower alkyl group or a lower alkanoyl group), and the salts of the carboxy group thereof, which are novel compounds having an anti-coccidium activity, and which can be obtained by synthesis or, partly, by cultivation of Streptomyces auranticolor.
由以下通式代表的 1,4-
萘醌衍
生物:
其中 R1 代表氢原子、羟基、低级烷氧基或芳
硫基; R2 代表羧基、酯化羧基或酰胺化羧基;或当 R1 和 R2 形成一个基团时,R1 代表氢原子或低级烷基; R4 代表低级烷基; R5 代表氢原子或卤原子。
代表氢原子或低级烷基,R4 代表低级烷基,R5 代表氢原子或卤原子,R6 代表氢原子、低级烷基或低级烷酰基)及其羧基的盐,它们是具有抗球虫活性的新型化合物,可通过合成或部分通过培养 Auranticolor 链霉菌获得。