| 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} |
| 228.8 | DF | .~.~ Hetero ring is six-membered and includes at least nitrogen and oxygen as ring hetero atoms (e.g., monocyclic 1,2- and 1,3-oxazines, etc.) {4} |
| 229.5 | DF | .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos (e.g., maytansinoids, etc.) {2} |
| 229.8 | DF | .~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {1} |
| 230.2 |  | .~.~.~.~.~ Ring nitrogen shared by two of the cyclos |