US PATENT SUBCLASS 548 / 442
.~.~.~.~.~.~.~ One of the benzene rings and an additional carbocyclic ring bonded directly to the same acyclic nitrogen

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}
416  DF  .~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {5}
427  DF  .~.~.~.~ Tricyclo ring system having the five-membered hetero ring as one of the cyclos {6}
439  DF  .~.~.~.~.~ The five-membered hetero ring shares ring carbons with two carbocyclic rings (e.g., tetrahydrocarbazoles, etc.) {3}
440  DF  .~.~.~.~.~.~ The five-membered hetero ring shares ring carbons with two benzene rings (i.e., carbazoles) {5}
442.~.~.~.~.~.~.~ One of the benzene rings and an additional carbocyclic ring bonded directly to the same acyclic nitrogen

DEFINITION

Classification: 548/442

(under subclass 440) Compounds wherein an additional carbocyclic ring and one of the benzene rings of the tricyclo ring system are bonded directly to the same acyclic nitrogen.

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