US PATENT SUBCLASS 544 / 338
.~.~.~.~.~ Polycyclo ring system having the diazine ring as one of the cyclos

Current as of: June, 1999
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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.~.~.~.~.~ Polycyclo ring system having the diazine ring as one of the cyclos {5}
339  DF  .~.~.~.~.~.~> Heptacyclo ring system having the diazine ring as one of the cyclos (e.g., indanthrones, etc.) {2}
342  DF  .~.~.~.~.~.~> Pentacyclo ring system having the diazine ring as one of the cyclos
343  DF  .~.~.~.~.~.~> Tetracyclo ring system having the diazine ring as one of the cyclos (e.g., benzophenazines, etc.)
344  DF  .~.~.~.~.~.~> Tricyclo ring system having the diazine ring as one of the cyclos {2}
349  DF  .~.~.~.~.~.~> Bicyclo ring system having the diazine ring as one of the cyclos {3}

DEFINITION

Classification: 544/338

Polycyclo ring system having the diazine ring as one of the cyclos:

(under subclass 336) Compounds wherein the six-membered hetero ring is one of the cyclos in a polycyclo ring system.

(1) Note. The positions of the six-membered hetero ring, even when it is part of a polycyclo ring system, are numbered as if it were a single ring.