| 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} |
| 268.1 | DF | .~.~.~ Additional hetero ring containing {4} |
| 276.4 | DF | .~.~.~.~ The additional hetero ring is five-membered consisting of one nitrogen and four carbons {4} |
| 276.7 | DF | .~.~.~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {2} |
| 277.4 | DF | .~.~.~.~.~.~ Bicyclo ring system which is indole (including hydrogenated) {2} |
| 277.7 |  | .~.~.~.~.~.~.~ Chalcogen attached directly to the five-membered hetero ring by nonionic bonding |