| 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 | | .~.~.~ Benzene ring containing {7} |
| 627 | DF | .~.~.~.~> Preparing by isomerization |
| 628 | DF | .~.~.~.~> Preparing by alkylation of benzene ring |
| 629 | DF | .~.~.~.~> Preparing by hydroxylation of benzene ring |
| 630 | DF | .~.~.~.~> Ether oxygen bonded directly to benzene ring {5} |
| 659 | DF | .~.~.~.~> Plural rings containing {2} |
| 662 | DF | .~.~.~.~> Polyoxy |
| 663 | DF | .~.~.~.~> Halogen containing |