| 514 / | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
| 1 | DF | DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29} |
| 579 | DF | .~ Nitrogen containing other than solely as a nitrogen in an inorganic ion of an addition salt, a nitro or a nitroso DOAI {22} |
| 631 | | .~.~ Amidines (i.e., N=C-N) {5} |
| 632 | DF | .~.~.~> Amidino hydrazines or hydrazones (i.e., N-N=C-N or N=C-N-N) |
| 633 | DF | .~.~.~> Amidoximes (i.e., N-C=N-O) |
| 634 | DF | .~.~.~> Guanidines (i.e., N=C(-N)-N) {1} |
| 636 | DF | .~.~.~> Polyamidines |
| 637 | DF | .~.~.~> Benzene ring containing |