US PATENT SUBCLASS 546 / 177
.~.~.~.~.~.~.~ Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding

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546 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
26  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9}
112  DF  .~.~.~.~ Bicyclo ring system having the six-membered hetero ring as one of the cyclos {7}
152  DF  .~.~.~.~.~ Quinolines (including hydrogenated) {14}
176  DF  .~.~.~.~.~.~ Nitrogen, other than as nitro or nitroso, attached indirectly to the quinoline ring system by nonionic bonding {1}
177.~.~.~.~.~.~.~ Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding

DEFINITION

Classification: 546/177

Chalcogen attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding:

(under subclass 176) Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached directly to the carbocyclic ring of the quinoline ring system by nonionic bonding.

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