| 546 / | 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) {1} |
| 1 | DF | .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24} |
| 290 |  | .~.~.~ Chalcogen bonded directly to ring carbon of the six-membered hetero ring {9} |
| 291 | DF | .~.~.~.~> Chalcogen and acyclic nitrogen bonded directly to the same carbon {1} |
| 293 | DF | .~.~.~.~> Sulfur bonded directly to acyclic nitrogen |
| 294 | DF | .~.~.~.~> Chalcogen bonded directly to chalcogen {1} |
| 296 | DF | .~.~.~.~> Plural chalcogens bonded directly to ring carbons of the six-membered hetero ring |
| 297 | DF | .~.~.~.~> Nitrogen attached directly to the six-membered hetero ring by nonionic bonding |
| 298 | DF | .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring {1} |
| 300 | DF | .~.~.~.~> Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding |
| 301 | DF | .~.~.~.~> Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding {1} |
| 303 | DF | .~.~.~.~> Halogen attached directly or indirectly to the six-membered hetero ring by nonionic bonding |