US PATENT SUBCLASS 546 / 81
.~.~.~.~.~.~ Plural ring nitrogens in 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}
81.~.~.~.~.~.~ Plural ring nitrogens in the tricyclo ring system {3}
82  DF  .~.~.~.~.~.~.~> Three or more ring hetero atoms in the tricyclo ring system {1}
84  DF  .~.~.~.~.~.~.~> One of the cyclos is five-membered {1}
88  DF  .~.~.~.~.~.~.~> Phenanthrolines (including hydrogenated)

DEFINITION

Classification: 546/81

Plural ring nitrogens in the tricyclo ring system:

(under subclass 80) Compounds wherein the tricyclo ring system contains at least two ring nitrogens.

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