| 504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS | 
| 
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| 116 | DF | PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9} | 
| 189 | DF | .~ Organic active compound containing {19} | 
| 320 | DF | .~.~ Carboxylic acid, carboxylic acid salt, carboxylic acid anhydride, or carboxylic acid halide {2} | 
| 321 |  | .~.~.~ Benzene ring containing {3} | 
| 322 | DF | .~.~.~.~> Nitrogen, other than as nitro or nitroso, attached directly or indirectly to the benzene ring by nonionic bonding | 
| 323 | DF | .~.~.~.~> Oxygen is bonded directly to the benzene ring and is part of an acyclic chain between the benzene ring and a -C(=O)O- group (e.g., 2,4-dichlorophenoxyacetic acids, etc.) | 
| 324 | DF | .~.~.~.~> The benzene ring is bonded directly to the carbon of a -C(=O)O- group (e.g., benzoic acids, etc.) |