| 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} |
| 112 | DF | .~.~.~.~ Bicyclo ring system having the six-membered hetero ring as one of the cyclos {7} |
| 152 | DF | .~.~.~.~.~ Quinolines (including hydrogenated) {14} |
| 153 | DF | .~.~.~.~.~.~ Chalcogen attached directly to the six-membered hetero ring by nonionic bonding {4} |
| 157 | DF | .~.~.~.~.~.~.~ Chalcogen attached directly at 2-position by nonionic bonding {1} |
| 158 |  | .~.~.~.~.~.~.~.~ Single bond between 3,4-positions |