| 548 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| * | DD | .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {4} |
| 400 | DF | .~.~ Hetero ring is five-membered consisting of one nitrogen and four carbons (e.g., halopyrrolidines, etc.) {20} |
| 416 | DF | .~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {5} |
| 427 | DF | .~.~.~.~ Tricyclo ring system having the five-membered hetero ring as one of the cyclos {6} |
| 439 | DF | .~.~.~.~.~ The five-membered hetero ring shares ring carbons with two carbocyclic rings (e.g., tetrahydrocarbazoles, etc.) {3} |
| 440 |  | .~.~.~.~.~.~ The five-membered hetero ring shares ring carbons with two benzene rings (i.e., carbazoles) {5} |
| 441 | DF | .~.~.~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the tricyclo ring system (e.g., carbazole-3-carboxylic acid, etc.) |
| 442 | DF | .~.~.~.~.~.~.~> One of the benzene rings and an additional carbocyclic ring bonded directly to the same acyclic nitrogen |
| 443 | DF | .~.~.~.~.~.~.~> Azido or sulfonyl attached directly to the tricyclo ring system by nonionic bonding (e.g., carbazole sulfonic acid, etc.) |
| 444 | DF | .~.~.~.~.~.~.~> Chalcogen or nitrogen attached indirectly to the tricyclo ring system by acyclic nonionic bonding |
| 445 | DF | .~.~.~.~.~.~.~> The tricyclo ring system is unsubstituted or is hydrocarbyl substituted only (e.g., N-vinyl carbazole, etc.) {1} |