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} |
580 | DF | .~.~.~ With preservative or stabilizer {1} |
581 | .~.~.~.~ Acyclic ether preserved or stabilized {1} | |
582 | DF | .~.~.~.~.~> Nitrogen containing preservative or stabilizer |