| 546 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
|
| * | 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} |
| 26 | DF | .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9} |
| 79 | DF | .~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {7} |
| 94 | DF | .~.~.~.~.~ Ring nitrogen is shared by two of the cyclos {1} |
| 95 |  | .~.~.~.~.~.~ Benzo(a)quinolizines (including hydrogenated) {1} |
| 96 | DF | .~.~.~.~.~.~.~> Additional polycyclo ring system having ring nitrogen (e.g., emetine, etc.) |