The present invention relates to compounds of Formula (I), or an agronomically acceptable salt of said compounds wherein A1, R1, Ra, Rb, Rc and Rd are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I), to intermediate compounds used to produce compounds of Formula (I), to processes for producing compounds of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.