US PATENT SUBCLASS 540 / 576
.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos


Current as of: June, 1999
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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.~.~.~ Polycyclo ring system which contains the hetero ring as one of the cyclos {4}
577  DF  .~.~.~.~> Plural nitrogens in the polycyclo ring system {3}
581  DF  .~.~.~.~> Two of the cyclos share at least three ring members or a ring carbon is shared by three of the cyclos (e.g., bridged, peri-fused, etc.) {1}
586  DF  .~.~.~.~> Tricyclo ring system which contains the hetero ring as one of the cyclos {1}
593  DF  .~.~.~.~> Bicyclo ring system which contains the hetero ring as one of the cyclos {1}


DEFINITION

Classification: 540/576

(under subclass 484) Compounds wherein the hetero ring is one of the cyclos of a polycyclo ring system.

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