| 514 / | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
|
| 1 | DF | DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29} |
| 183 | DF | .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16} |
| 247 | DF | .~.~ Hetero ring is six-membered consisting of two nitrogens and four carbon atoms (e.g., pyridazines, etc.) {4} |
| 256 | DF | .~.~.~ 1,3-diazines (e.g., pyrimidines, etc.) {4} |
| 257 | DF | .~.~.~.~ Polycyclo ring system having 1,3-diazine as one of the cyclos {2} |
| 258 |  | .~.~.~.~.~ Bicyclo ring system having 1,3-diazine as one of the cyclos {2} |
| 259 | DF | .~.~.~.~.~.~> Quinazolines (including hydrogenated) {1} |
| 261 | DF | .~.~.~.~.~.~> Purines (including hydrogenated) {2} |