| 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} |
| 305 | DF | .~.~ Benzene ring containing {24} |
| 336 | DF | .~.~.~ Amino nitrogen attached to aryl ring or ring system by an acyclic carbon or chain {11} |
| 346 | | .~.~.~.~ Ether oxygen is part of the chain {1} |
| 347 | DF | .~.~.~.~.~> The ether oxygen is bonded directly to the aryl ring or ring system {3} |