US PATENT SUBCLASS 546 / 92
.~.~.~.~.~.~.~ Plural chalcogens bonded directly to ring carbons of the tricyclo ring system

Current as of: June, 1999
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546 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
26  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9}
79  DF  .~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {7}
80  DF  .~.~.~.~.~ Plural ring hetero atoms in the tricyclo ring system {2}
89  DF  .~.~.~.~.~.~ Ring oxygen in the tricyclo ring system {3}
92.~.~.~.~.~.~.~ Plural chalcogens bonded directly to ring carbons of the tricyclo ring system

DEFINITION

Classification: 546/92

Plural chalcogens bonded directly to ring carbons of the tricyclo ring system:

(under subclass 89) Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to ring carbons of the tricyclo ring system.

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