US PATENT SUBCLASS 544 / 304
.~.~.~.~.~.~.~ Alicyclic ring attached directly or indirectly to the diazine ring by nonionic bonding

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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}
242  DF  .~.~.~.~ 1,3-diazines {10}
298  DF  .~.~.~.~.~ Chalcogen bonded directly to diazine ring carbon {4}
299  DF  .~.~.~.~.~.~ At 2-, 4-, and 6-positions (e.g., barbituric acid, etc.) {8}
304.~.~.~.~.~.~.~ Alicyclic ring attached directly or indirectly to the diazine ring by nonionic bonding

DEFINITION

Classification: 544/304

Alicyclic ring attached directly or indirectly to the diaziane ring by nonionic bonding:

(under subclass 299) Compounds wherein an alicyclic ring is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.

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