| 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} |
| 449 | DF | .~.~ Oxygen containing hetero ring {4} |
| 451 | DF | .~.~.~ The hetero ring is six-membered {4} |
| 459 | | .~.~.~.~ Nitrogen containing |