| 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} |
| 606 | DF | .~.~.~ Plural oxyalkylene groups bonded directly to each other {3} |
| 613 | DF | .~.~.~.~ Acyclic {6} |
| 622 | DF | .~.~.~.~.~ Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) {2} |
| 623 | | .~.~.~.~.~.~ Polyhydroxy containing {1} |
| 624 | DF | .~.~.~.~.~.~.~> Plural diverse oxyalkylene groups containing |