| 504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS |
| 116 | DF | PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9} |
| 174 | DF | .~ Stunting or dwarfing agent {4} |
| 176 | DF | .~.~ Hetero ring containing active ingredient {2} |
| 179 | DF | .~.~.~ Hetero ring is five-membered including nitrogen {1} |
| 180 | DF | .~.~.~.~ Plural ring nitrogens in the hetero ring {1} |
| 181 | | .~.~.~.~.~ Oxygen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding |