| 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} | 
| 148 | DF | .~.~.~.~ Polycyclo ring system having the thiazole ring as one of the cyclos {3} | 
| 152 | DF | .~.~.~.~.~ Bicyclo ring system having the thiazole ring as one of the cyclos {8} | 
| 165 | DF | .~.~.~.~.~.~ Chalcogen bonded directly to ring carbon of the thiazole ring {5} | 
| 174 | DF | .~.~.~.~.~.~.~ Sulfur double bonded or thiol bonded directly to ring carbon of the thiazole ring {2} | 
| 175 |  | .~.~.~.~.~.~.~.~ Process of forming the bicyclo ring system {1} | 
| 176 | DF | .~.~.~.~.~.~.~>.~.~ Aniline or alkyl derivative thereof utilized as starting material |