| 544 / | 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 having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6} |
| 224 | DF | .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9} |
| 242 |  | .~.~.~.~ 1,3-diazines {10} |
| 243 | DF | .~.~.~.~.~> Phosphorus attached directly or indirectly to the diazine ring by nonionic bonding {1} |
| 245 | DF | .~.~.~.~.~> Polycyclo ring system having the diazine ring as one of the cyclos {3} |
| 294 | DF | .~.~.~.~.~> Polycyclo-carbocyclic ring system having at least three cyclos |
| 295 | DF | .~.~.~.~.~> Plural diazine rings {1} |
| 297 | DF | .~.~.~.~.~> Nitrogen attached directly at 2-position by nonionic bonding and sulfur bonded directly to the nitrogen |
| 298 | DF | .~.~.~.~.~> Chalcogen bonded directly to diazine ring carbon {4} |
| 322 | DF | .~.~.~.~.~> Nitrogen attached directly to diazine ring by nonionic bonding {3} |
| 333 | DF | .~.~.~.~.~> Additional hetero ring which is unsaturated |
| 334 | DF | .~.~.~.~.~> Halogen attached directly to the diazine ring by nonionic bonding |
| 335 | DF | .~.~.~.~.~> Chalcogen attached indirectly to the diazine ring by nonionic bonding |