| 544 / | 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) {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} |
| 180 |  | .~.~.~ Triazines {11} |
| 181 | DF | .~.~.~.~> Heavy metal or aluminum containing |
| 182 | DF | .~.~.~.~> Asymmetrical (e.g., 1, 2, 4-triazines, etc.) {1} |
| 185 | DF | .~.~.~.~> Hexamethylenetetramines {1} |
| 187 | DF | .~.~.~.~> Anthrone or anthraquinone containing {2} |
| 190 | DF | .~.~.~.~> Cyanuric chloride or dichloroisocyanuric acid salt {1} |
| 192 | DF | .~.~.~.~> Cyanuric acid per se or salt thereof |
| 193 | DF | .~.~.~.~> Trimerization process to form the triazine ring |
| 193.1 | DF | .~.~.~.~> Stilbene containing {1} |
| 194 | DF | .~.~.~.~> Substituent nitrogen bonded directly to carbon of the triazine ring {5} |
| 214 | DF | .~.~.~.~> Phosphorus containing |
| 215 | DF | .~.~.~.~> Chalcogen or halogen containing substituent {1} |