| 摘要 |
This invention discloses chemical compounds of the formula <IMAGE> wherein X1 and X2 are independently selected from the group consisting of oxygen and sulfur; m is the integer 0 or 1; R1 is selected from the group consisting of hydrogen and alkyl; R2 is alkyl; R3 and R4 are independently selected from the group consisting of hydrogen and alkyl; R5 is selected from the group consisting of hydrogen, alkyl, alkoxy, alkylthio, amino and <IMAGE> WHEREIN Y is selected from the group consisting of alkyl, halogen, alkoxy, alkylthio, nitro and cyano; and n is an integer from 0 to 3; and R6 is selected from the group consisting of alkyl, alkenyl, alkoxyalkyl and <IMAGE> WHEREIN Z is selected from the group consisting of alkyl, halogen, alkoxy, alkylthio, nitro and cyano; and p is an integer from 0 to 3. |
