| 568 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
|
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {4} |
| 300 | DF | .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11} |
| 579 | DF | .~.~ Ethers {11} |
| 626 | DF | .~.~.~ Benzene ring containing {7} |
| 630 | DF | .~.~.~.~ Ether oxygen bonded directly to benzene ring {5} |
| 631 | DF | .~.~.~.~.~ Plural rings containing {6} |
| 635 | DF | .~.~.~.~.~.~ Plural benzene rings bonded directly to the same oxygen {2} |
| 636 |  | .~.~.~.~.~.~.~ Polyoxy {2} |
| 637 | DF | .~.~.~.~.~.~.~>.~ Halogen containing |
| 638 | DF | .~.~.~.~.~.~.~>.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) |