摘要 |
Compounds of the general formula: <CHEM> wherein R<1> is aryl which may have 1 to 5 substituent(s) selected from the groups consisting of halogen, lower alkyl, lower alkoxy, lower alkanesulfonamido, mono(or di or tri)-halo(lower)alkyl, carbomoyl, hydroxy, nitro, amino, cyano, sulfamoyl, N,N-di(lower)alkylsulfamoyl, and di(lower)alkylamino which may form a 3 to 7-membered ring with or without an oxygen or nitrogen atom; |