| 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} |
| 200 | DF | .~.~ 1-thia-5-aza-bicyclo (4.2.0) octane ring containing (including dehydrogenated) (e.g., cephalosporins, etc.) {4} |
| 202 | | .~.~.~ Additional hetero ring {2} |
| 203 | DF | .~.~.~.~> 3-position substituent contains pyridine ring |
| 204 | DF | .~.~.~.~> 3-position substituent contains sulfur {3} |