US PATENT SUBCLASS 546 / 281.7
.~.~.~.~ Ring oxygen in the additional hetero ring

Current as of: June, 1999
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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}
281.7.~.~.~.~ Ring oxygen in the additional hetero ring {2}
282.1  DF  .~.~.~.~.~> The additional hetero ring is six-membered {2}
283.4  DF  .~.~.~.~.~> The additional hetero ring is five-membered {4}

DEFINITION

Classification: 546/281.7

Ring oxygen in the additional hetero ring:

(under subclass 268.1) Compounds wherein the additional hetero ring contains ring oxygen.

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