US PATENT SUBCLASS 548 / 560
.~.~.~ Two double bonds between ring members of the five-membered hetero ring


Current as of: June, 1999
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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}
400  DF  .~.~ Hetero ring is five-membered consisting of one nitrogen and four carbons (e.g., halopyrrolidines, etc.) {20}
560.~.~.~ Two double bonds between ring members of the five-membered hetero ring {4}
561  DF  .~.~.~.~> Nitrogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding
562  DF  .~.~.~.~> Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding
563  DF  .~.~.~.~> Benzene ring bonded directly to ring nitrogen of the five -membered hetero ring
564  DF  .~.~.~.~> The five-membered hetero ring is unsubstituted or alkyl substituted only (e.g., pyrrole, etc.)


DEFINITION

Classification: 548/560

(under subclass 400) Compounds wherein there are two double bonds between ring members of the five-membered hetero ring.

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