| 504 / | HD | PLANT PROTECTING AND REGULATING COMPOSITIONS |
| 103 | DF | ANTIDOTES (e.g., safeners, antagonists, etc.) {4} |
| 104 | ![]() | .~ Hetero ring containing antidote {3} |
| 105 | DF | .~.~> Hetero ring is six-membered including nitrogen |
| 106 | DF | .~.~> Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., thiazoles, etc.) {1} |
| 108 | DF | .~.~> Oxygen containing hetero ring |