504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS |
116 | DF | PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9} |
162 | DF | .~ Abscission agent, defoliant, or desiccant {6} |
166 | DF | .~.~ Hetero ring containing active ingredient {2} |
169 | .~.~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen {1} | |
170 | DF | .~.~.~.~> Ring chalcogen in the hetero ring |