| 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} |
| 638 | | .~.~ Nitrogen double bonded directly to carbon {3} |
| 639 | DF | .~.~.~> Hydrazones (i.e., C=N-N) |
| 640 | DF | .~.~.~> Oximes (i.e., C=N-O-) |
| 641 | DF | .~.~.~> Aldimines or ketimines which contain a benzene ring (i.e., RC=N wherein R is C or H) |