| 534 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES | 
| * | DD | ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8} | 
| 566 |  | .~ Azoxy {5} | 
| 567 | DF | .~.~> Hetero ring containing | 
| 568 | DF | .~.~> Azodioxy | 
| 569 | DF | .~.~> Heavy metal or aluminum containing | 
| 570 | DF | .~.~> Sulfonic acid group containing (-(0=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal) {1} | 
| 572 | DF | .~.~> Formation of azoxy group |