| 摘要 |
Compounds having the formula (I) <IMAGE> [wherein: R1 and R2 are each alkyl or halogen, or they are trimethylene or tetramethylene; R3 is hydrogen or alkyl; A is alkylene; and R4 is optionally substituted phenyloxy or benzyloxy substituted with at least one alkyl, halogen, alkoxy, alkylthio, alkenyl, trifluoromethyl or nitro; optionally substituted phenyl substituted with one or two halogen atoms, alkyl or alkoxy; furyl or thienyl] and their salts. |
