US PATENT SUBCLASS 546 / 56
.~.~.~.~.~.~.~ Three or more ring carbons of the pentacyclo ring system are substituted (e.g., substituted quinacridones, etc.)

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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}
42  DF  .~.~.~.~ Pentacyclo ring system having the six-membered hetero ring as one of the cyclos {3}
47  DF  .~.~.~.~.~ Plural ring hetero atoms in the pentacyclo ring system {2}
49  DF  .~.~.~.~.~.~ Two ring nitrogens in the pentacyclo ring system (e.g., quinacridones, etc.) {2}
56.~.~.~.~.~.~.~ Three or more ring carbons of the pentacyclo ring system are substituted (e.g., substituted quinacridones, etc.) {1}
57  DF  .~.~.~.~.~.~.~>.~ Three or more chalcogens containing

DEFINITION

Classification: 546/56

Three or more ring carbons of the pentacyclo ring system are substituted (e.g., substituted quinacridones, etc.):

(under subclass 49) Compounds which contain substituents

(other than hydrogen) on at least three of the ring carbons of the pentacyclo ring system.

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