| 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} |
| 463 | DF | .~.~ Acyclic {16} |
| 489 | DF | .~.~.~ Forming amine group directly by reduction {2} |
| 490 | DF | .~.~.~.~ Of cyano {2} |
| 491 | | .~.~.~.~.~ Of plural cyanos {1} |
| 492 | DF | .~.~.~.~.~.~> Preparing hexamethylene diamine |