| abstract |
The present invention relates to compounds of Formula (I); or an agronomically acceptable salt of said compounds wherein A 1a , A 1b , A 2 , A 3 , A 4 , X, R 1 and R 2 are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I), and to their use for controlling weeds, in particular in crops of useful plants. |