| 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} |
| 667 | ![]() | .~.~.~ Unsaturated alicyclic ring containing {1} |
| 668 | DF | .~.~.~.~> 2,6,6-trialkylcyclohexenyl (e.g., vitamin A derivatives, etc.) |