US PATENT SUBCLASS 544 / 339
.~.~.~.~.~.~ Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.)

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544 /   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 having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224  DF  .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
336  DF  .~.~.~.~ 1,4-diazines {9}
338  DF  .~.~.~.~.~ Polycyclo ring system having the diazine ring as one of the cyclos {5}
339.~.~.~.~.~.~ Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.) {2}
340  DF  .~.~.~.~.~.~.~> Chalcogen attached indirectly to the heptacyclo ring system by nonionic bonding
341  DF  .~.~.~.~.~.~.~> Halogen, nitrogen, or carbon attached directly to the heptacyclo ring system by nonionic bonding

DEFINITION

Classification: 544/339

Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.):

(under subclass 338) Compounds wherein the polycyclo ring system consists of seven rings.

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

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