| 564 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| 1 | DF | .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37} |
| 281 | DF | .~.~ Quaternary ammonium containing {2} |
| 282 |  | .~.~.~ Benzene ring containing {6} |
| 283 | DF | .~.~.~.~> Two rings bonded directly to the same carbon |
| 284 | DF | .~.~.~.~> Nitro or nitroso, bonded directly to carbon containing |
| 285 | DF | .~.~.~.~> Hydroxy, bonded directly to carbon, or ether containing (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal) {2} |
| 288 | DF | .~.~.~.~> Acyclic carbon to carbon unsaturation containing |
| 289 | DF | .~.~.~.~> Halogen attached indirectly to the ammonium nitrogen by nonionic bonding |
| 290 | DF | .~.~.~.~> Polyquaternary ammonium |