| 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} |
| 304 |  | .~.~.~ Nitrogen attached directly to the six-membered hetero ring by nonionic bonding {7} |
| 305 | DF | .~.~.~.~> Sulfur and acyclic nitrogen bonded directly to the same carbon |
| 306 | DF | .~.~.~.~> Plural acyclic nitrogens bonded directly to the same carbon or single bonded directly to each other |
| 307 | DF | .~.~.~.~> Plural nitrogens attached directly to the six-membered hetero ring by nonionic bonding {1} |
| 309 | DF | .~.~.~.~> Acyclic nitrogen bonded directly to a -C(=X)- group, wherein X is chalcogen |
| 310 | DF | .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the six-membered hetero ring |
| 311 | DF | .~.~.~.~> The nitrogen bonded additionally only to hydrogen |
| 312 | DF | .~.~.~.~> Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding |