US PATENT SUBCLASS 514 / 463
.~.~.~.~ Plural ring oxygens in the hetero ring


Current as of: June, 1999
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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
183  DF  .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16}
449  DF  .~.~ Oxygen containing hetero ring {4}
461  DF  .~.~.~ The hetero ring is five-membered {5}
463.~.~.~.~ Plural ring oxygens in the hetero ring {2}
464  DF  .~.~.~.~.~> Bicyclo ring system having the hetero ring as one of the cyclos (e.g., methylenedioxyphenyl group, etc.) {2}
467  DF  .~.~.~.~.~> Only two ring oxygens in the hetero ring which is not a polycyclo ring system (e.g., dioxolane, etc.)


DEFINITION

Classification: 514/463

Plural ring oxygens in the hetero ring:

(under subclass 461) Subject matter wherein the five-membered hetero ring contains at least two ring oxygens.