| 534 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8} |
| 573 | DF | .~ Azo {51} |
| 692 | DF | .~.~ Heavy metal or aluminum containing {7} |
| 713 |  | .~.~.~ Benzene ring containing {6} |
| 714 | DF | .~.~.~.~> At least three azo groups in the same azo moiety attached indirectly to each other by nonionic bonding {1} |
| 716 | DF | .~.~.~.~> Two azo groups in the same azo moiety attached indirectly to each other by nonionic bonding {2} |
| 720 | DF | .~.~.~.~> Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.) {1} |
| 722 | DF | .~.~.~.~> Plural bicyclo carbocyclic ring systems bonded directly to the azo group |
| 723 | DF | .~.~.~.~> Sulfonyl bonded directly to amino nitrogen (e.g., sulfonamide, etc.) |
| 724 | DF | .~.~.~.~> Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of -OH may be replaced by the ammonium ion or a metal) {1} |