US PATENT SUBCLASS 546 / 280.1
.~.~.~.~.~ The additional hetero ring is six-membered


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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}
268.1  DF  .~.~.~ Additional hetero ring containing {4}
279.7  DF  .~.~.~.~ Ring sulfur in the additional hetero ring {2}
280.1.~.~.~.~.~ The additional hetero ring is six-membered


DEFINITION

Classification: 546/280.1

The additional hetero ring is six-membered:

(under subclass 279.7) Compounds wherein six ring atoms are present in the additional hetero ring.

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