| abstract |
The present invention relates to compounds of formula (I), or an agronomically acceptable salt of said compound, wherein A 1 , A 2 , R 1 , R 2 , R 3 and R 4 are as defined herein. The invention further relates to herbicidal compositions comprising compounds of formula (I), to their use for controlling weeds, in particular in crops of useful plants, and to intermediates for the synthesis of said compounds. |