Patent ID: 7432227

Claim:
A compound of the formula I wherein X represents F; Y represents C 1 -C 4 alkyl, C 1 -C 4 alkoxy substituted C 1 -C 4 alkyl, C 1 -C 4 thioalkoxy substituted C 1 -C 4 alkyl, or C 2 -C 3 alkenyl; and W represents —NO 2 , —N 3 , —NR 1 R 2 , —N═CR 3 R 4 or —NHN═CR 3 R 4 wherein R 1 and R 2 independently represent H, C 1 -C 6 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, aryl, hydroxy, C 1 -C 6 alkoxy, amino, C 1 -C 6 acyl, C 1 -C 6 carboalkoxy, C 1 -C 6 alkylcarbamyl, C 1 -C 6 alkylsulfonyl, C 1 -C 6 trialkylsilyl or C 1 -C 6 dialkyl phosphonyl; and R 3 and R 4 independently represent H, C 1 -C 6 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl or aryl; and agriculturally acceptable derivatives of the carboxylic acid group or the 4-amino group.