| 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} |
| 751 | DF | .~.~ Hetero ring containing {5} |
| 753 | DF | .~.~.~ Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos {11} |
| 756 | DF | .~.~.~.~ Two azo groups attached indirectly to each other by nonionic bonding {5} |
| 757 | DF | .~.~.~.~.~ Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to an azo group {2} |
| 759 | DF | .~.~.~.~.~.~ Plural monocyclic benzene rings, each bonded directly to an azo group, are between the azo groups {1} |
| 760 |  | .~.~.~.~.~.~.~ The benzene rings are bonded directly to each other |