US PATENT SUBCLASS 548 / 178
.~.~.~.~.~.~ Chalcogen or nitrogen attached directly to the other cyclo of the bicyclo ring system by nonionic bonding

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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}
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}
178.~.~.~.~.~.~ Chalcogen or nitrogen attached directly to the other cyclo of the bicyclo ring system by nonionic bonding

DEFINITION

Classification: 548/178

(under subclass 152) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen is attached directly to the other cyclo of the bicyclo ring system by nonionic bonding, i.e., the cyclo other than the thiazole ring.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]