US PATENT SUBCLASS 540 / 512
.~.~.~.~.~.~.~ Chalcogen attached indirectly to nitrogen of the hetero ring by acyclic nonionic bonding

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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}
485  DF  .~.~.~ Chalcogen double bonded directly to a ring carbon adjacent to the ring nitrogen (e.g., caprolactam, etc.) {15}
492  DF  .~.~.~.~ Plural nitrogens in the hetero ring {3}
500  DF  .~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos {4}
504  DF  .~.~.~.~.~.~ The bicyclo ring system is 1,4-benzodiazepine (including hydrogenated) {10}
512.~.~.~.~.~.~.~ Chalcogen attached indirectly to nitrogen of the hetero ring by acyclic nonionic bonding

DEFINITION

Classification: 540/512

(under subclass 504) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is attached indirectly to a nitrogen of the hetero ring by acyclic nonionic bonding.

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