| 摘要 |
This disclosure describes compounds of the formula <IMAGE> wherein R1 represents hydrogen, fluoro, chloro, lower alkyl having 1 to 4 carbon atoms, or lower alkoxy having 1 to 4 carbon atoms, and R2 represents lower alkyl or <IMAGE> where R5 represents hydrogen, fluoro, chloro, lower alkyl or lower alkoxy, and R3 and R4 each independently represent lower alkyl as defined above, and R3 and R4 together with N represent <IMAGE> or pharmaceutically acceptable acid addition salts thereof, which are useful as anti-diabetic agents.
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