| abstract |
Compounds represented by the following general formula:n (wherein R 1 represents H, halogen, lower alkyl, lower alkoxy, substituted or unsubstituted phenoxy, nitro or cyano, R 2 represents H, lower alkyl or lower alkylthio, and R represents a-halogenoalkyl or a group represented byn a process for their preparation, and a medicinal composition containing same having an immunity-controlling action effective against chronic articular rheumatism, viral diseases, cancer, etc. |