US PATENT SUBCLASS 548 / 565
.~.~.~ One double bond between ring members of the five-membered hetero ring (i.e., pyrrolines)


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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}
565.~.~.~ One double bond between ring members of the five-membered hetero ring (i.e., pyrrolines)


DEFINITION

Classification: 548/565

(under subclass 400) Compounds wherein there is one double bond only between ring members of the five-membered hetero ring.