Novel pteridines of formula (I), ##SPC1## wherein R is a lower alkyl group, optionally substituted with a hydroxy group and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group having together at least 3 carbon atoms or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation. The above compounds have bacteriostatic activity.
新型蝶啶类化合物,其分子式为(I),##
SPC1## 其中R代表一个低级烷基,可选地被一个羟基所取代,而R1和R2相同或不同,每个都是具有至少3个碳原子的低级烷基,或者R1和R2与蝶啶环结构中的碳原子共同形成一个具有4到6个碳原子的螺环环烷基环系,以及它们的制备方法。上述化合物具有抑菌活性。