| 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 | DF | .~.~ Amidines (i.e., N=C-N) {5} |
| 634 | | .~.~.~ Guanidines (i.e., N=C(-N)-N) {1} |
| 635 | DF | .~.~.~.~> Biguanides (i.e., N=C(-N)-N(N-)C=N) |