| 504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS | 
| 
 | 
| 116 | DF | PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9} | 
| 189 | DF | .~ Organic active compound containing {19} | 
| 209 | DF | .~.~ Hetero ring containing {11} | 
| 210 | DF | .~.~.~ Acyclic urea or thiourea bonded directly to ring carbon of the hetero ring (i.e., HNH-C(=X)-NH-, wherein X is sulfur or oxygen and substitution may be made for hydrogen only) {2} | 
| 216 |  | .~.~.~.~ The hetero ring is five-membered including nitrogen {1} | 
| 217 | DF | .~.~.~.~.~> Plural ring nitrogens and a single ring chalcogen in the hetero ring (e.g., 1,3,4-thiadiazoles, etc.) |