US PATENT SUBCLASS 544 / 58.7
.~.~.~.~.~.~.~ Ring chalcogen in the additional hetero ring

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}
3  DF  .~.~.~ Six-membered hetero ring consists of oxygen, sulfur, nitrogen and carbon (e.g., oxathiazines, etc.) {7}
56  DF  .~.~.~.~ 1,4-thiazines {3}
58.1  DF  .~.~.~.~.~ Double bonded divalent chalcogen containing {3}
58.5  DF  .~.~.~.~.~.~ Additional hetero ring containing {2}
58.7.~.~.~.~.~.~.~ Ring chalcogen in the additional hetero ring

DEFINITION

Classification: 544/58.7

(under subclass 58.5) Compounds having, in addition to the thiazine ring, a hetero ring which includes a ring chalcogen

(i.e., oxygen, sulfur, selenium, or tellurium).

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