US PATENT SUBCLASS 544 / 215
.~.~.~.~ Chalcogen or halogen containing substituent

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}
180  DF  .~.~.~ Triazines {11}
215.~.~.~.~ Chalcogen or halogen containing substituent {1}
216  DF  .~.~.~.~.~> Bonded to triazine ring carbon {2}

DEFINITION

Classification: 544/215

(under subclass 180) Compounds having a substituent containing chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or halogen bonded directly or indirectly to the six-membered hetero ring.