| 564 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| 1 | DF | .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37} |
| 2 | DF | .~.~ With preservative or stabilizer {3} |
| 5 | DF | .~.~.~ Benzene ring containing compound with preservative or stabilizer {2} |
| 7 | | .~.~.~.~ Sulfur or phenol containing preservative or stabilizer |