| 514 / | HD | DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS |
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| 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} |
| 277 | DF | .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbon atoms {11} |
| 336 | DF | .~.~.~ Additional hetero ring containing {2} |
| 337 | DF | .~.~.~.~ The additional hetero ring is one of the cyclos in a polycyclo ring system {2} |
| 338 |  | .~.~.~.~.~ Plural hetero atoms in the polycyclo ring system |