| 549 / | 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) {2} |
| 1 | DF | .~.~ Sulfur containing hetero ring (e.g., thiiranes, etc.) {9} |
| 29 |  | .~.~.~ The hetero ring is five-membered {13} |
| 30 | DF | .~.~.~.~> Plural ring hetero atoms in the hetero ring {4} |
| 41 | DF | .~.~.~.~> Polycyclo ring system having the hetero ring as one of the cyclos {3} |
| 59 | DF | .~.~.~.~> Additional hetero ring containing {1} |
| 61 | DF | .~.~.~.~> Cyano bonded directly to the hetero ring |
| 62 | DF | .~.~.~.~> Chalcogen bonded directly to ring carbon of the hetero ring {5} |
| 68 | DF | .~.~.~.~> Nitrogen attached directly to the hetero ring by nonionic bonding {1} |
| 70 | DF | .~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring {3} |
| 74 | DF | .~.~.~.~> Nitrogen attached indirectly to the hetero ring by nonionic bonding {1} |
| 78 | DF | .~.~.~.~> Chalcogen attached indirectly to the hetero ring by nonionic bonding {1} |
| 80 | DF | .~.~.~.~> Unsaturated carbocyclic ring or acyclic carbon to carbon unsaturation containing |
| 81 | DF | .~.~.~.~> Halogen attached directly to the hetero ring by nonionic bonding {1} |
| 83 | DF | .~.~.~.~> The compound consists of the ring sulfur, carbon, and hydrogen {2} |
| 87 | DF | .~.~.~.~> Plural chalcogens double bonded directly to ring sulfur of the hetero ring |