1,4-naphthoquinone derivatives represented by the following general formula: ##STR1## (wherein R.sup.1 represents a hydrogen atom, a hydroxy group, a lower alkoxy group or an arylthio group, R.sup.2 represents a carboxy group, an esterified carboxy group or an amidated carboxy group or, when taken together, R.sup.1 and R.sup.2 form a group of ##STR2## R.sup.3 represents a hydrogen atom or a lower alkyl group, R.sup.4 represents a lower alkyl group, R.sup.5 represents a hydrogen atom or a halogen atom, and R.sup.6 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 anticoccidium activity, and which can be obtained by synthesis or, partly, by cultivation of Streptomyces auranticolor.
以下是由下列通用式表示的
1,4-萘醌衍
生物:##STR1##(其中R.sup.1代表氢原子,羟基,较低的烷氧基或芳基
硫基,R.sup.2代表羧基,酯化羧基或酰胺化羧基或当它们一起取时,R.sup.1和R.sup.2形成一个##STR2##的基团,R.sup.3代表氢原子或较低的烷基,R.sup.4代表较低的烷基,R.sup.5代表氢原子或卤素原子,R.sup.6代表氢原子,较低的烷基或较低的脂肪酰基),以及其羧基盐,这些化合物是具有抗球虫活性的新化合物,可以通过合成或部分通过STreptomyces auranticolor的培养获得。