548 / | 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) {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} |
200 | | .~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the thiazole ring {1} |
201 | DF | .~.~.~.~.~> The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens |