| 534 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8} |
| 573 | DF | .~ Azo {51} |
| 692 | DF | .~.~ Heavy metal or aluminum containing {7} |
| 713 | DF | .~.~.~ Benzene ring containing {6} |
| 722 | ![]() | .~.~.~.~ Plural bicyclo carbocyclic ring systems bonded directly to the azo group |