US PATENT SUBCLASS 540 / 588
.~.~.~.~.~.~ The nitrogen of the hetero ring is bonded directly to each of the two benzene rings (e.g., iminodibenzyl, etc.)


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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
484  DF  .~.~ The hetero ring contains seven members including nitrogen and carbon {14}
576  DF  .~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos {4}
586  DF  .~.~.~.~ Tricyclo ring system which contains the hetero ring as one of the cyclos {1}
587  DF  .~.~.~.~.~ The hetero ring shares ring members with each of two benzene rings in the tricyclo ring system (e.g., morphanthridines, etc.) {1}
588.~.~.~.~.~.~ The nitrogen of the hetero ring is bonded directly to each of the two benzene rings (e.g., iminodibenzyl, etc.) {4}
589  DF  .~.~.~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly to ring nitrogen of the tricyclo ring system
590  DF  .~.~.~.~.~.~.~> Nitrogen attached directly or indirectly to ring carbon of the hetero ring by acyclic nonionic bonding
591  DF  .~.~.~.~.~.~.~> Chalcogen attached directly or indirectly to the hetero ring by acyclic nonionic bonding
592  DF  .~.~.~.~.~.~.~> Nitrogen attached indirectly to ring nitrogen of the hetero ring by acyclic nonionic bonding


DEFINITION

Classification: 540/588

(under subclass 587) Compounds wherein the nitrogen of the hetero ring is bonded directly to each of the two benzene rings.

(1) Note. Examples of compounds provided for herein are: [figure]