US PATENT SUBCLASS 548 / 475
.~.~.~.~.~.~.~.~.~ Chalcogen or nitrogen attached directly to the ring nitrogen of the five membered hetero ring by nonionic bonding

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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}
416  DF  .~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {5}
452  DF  .~.~.~.~ Bicyclo ring system having the five-membered hetero ring as one of the cyclos (e.g., octahydroindoles, etc.) {7}
469  DF  .~.~.~.~.~ The bicyclo ring system consists of the five-membered hetero ring and a benzene ring (e.g., indole, etc.) {10}
470  DF  .~.~.~.~.~.~ The ring nitrogen is bonded directly to two ring carbons of the same cyclo which carbons are members of one cyclo only (i.e., isoindoles or isoindolenines) {3}
472  DF  .~.~.~.~.~.~.~ Chalcogen bonded directly to ring carbon of the five-membered hetero ring (e.g., phthalimidines, etc.) {1}
473  DF  .~.~.~.~.~.~.~.~ Plural chalcogens bonded directly to ring carbons of the five-membered hetero ring (e.g., phthalimides, etc.) {6}
475.~.~.~.~.~.~.~.~.~ Chalcogen or nitrogen attached directly to the ring nitrogen of the five membered hetero ring by nonionic bonding

DEFINITION

Classification: 548/475

(under subclass 473) Compounds wherein the ring nitrogen of the five-membered hetero ring is bonded directly to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen by nonionic bonding.

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