US PATENT SUBCLASS 514 / 266
.~.~.~.~.~.~.~ Additional 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}
247  DF  .~.~ Hetero ring is six-membered consisting of two nitrogens and four carbon atoms (e.g., pyridazines, etc.) {4}
256  DF  .~.~.~ 1,3-diazines (e.g., pyrimidines, etc.) {4}
257  DF  .~.~.~.~ Polycyclo ring system having 1,3-diazine as one of the cyclos {2}
258  DF  .~.~.~.~.~ Bicyclo ring system having 1,3-diazine as one of the cyclos {2}
261  DF  .~.~.~.~.~.~ Purines (including hydrogenated) {2}
266.~.~.~.~.~.~.~ Additional hetero ring


DEFINITION

Classification: 514/266

Additional hetero ring:

(under subclass 261) Subject matter wherein the purine compound has a substituent which is a heterocyclic ring or contains a heterocyclic ring.