US PATENT SUBCLASS 546 / 29
.~.~.~.~.~ The six-membered hetero ring shares ring nitrogen with a five-membered cyclo which contains additional ring nitrogen

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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}
28  DF  .~.~.~.~ Nonacyclo ring system having the six-membered hetero ring as one of the cyclos {1}
29.~.~.~.~.~ The six-membered hetero ring shares ring nitrogen with a five-membered cyclo which contains additional ring nitrogen

DEFINITION

Classification: 546/29

The six-membered hetero ring shares ring nitrogen with a five-membered cyclo which contains additional ring nitrogen:

(under subclass 28) Compounds wherein the nitrogen atom of the six-membered hetero ring is also a member of a five-membered cyclo which contains additional ring nitrogen.

(1) Note. An example of a compound provided for herein is: [figure]