| 548 / | 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) {4} |
| 100 | DF | .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18} |
| 146 | DF | .~.~.~ 1,3-thiazoles (including hydrogenated) {7} |
| 190 | DF | .~.~.~.~ Nitrogen attached directly to the thiazole ring by nonionic bonding {4} |
| 193 | DF | .~.~.~.~.~ Chalcogen attached indirectly to the thiazole ring by nonionic bonding {2} |
| 194 | DF | .~.~.~.~.~.~ The chalcogen, X, is in a -C(=X)- group {1} |
| 195 |  | .~.~.~.~.~.~.~ The -C(=X)- group is bonded directly to the nitrogen {1} |
| 196 | DF | .~.~.~.~.~.~.~>.~ Chalcogen or additional nitrogen bonded directly to the -C(=X)- group |