US PATENT SUBCLASS 514 / 49
.~.~.~.~ Pyrimidines (including hydrogenated) (e.g., cytosine, etc.)

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}
23  DF  .~ Carbohydrate (i.e., saccharide radical containing) DOAI {6}
42  DF  .~.~ N-glycoside {1}
43  DF  .~.~.~ Nitrogen containing hetero ring {4}
49.~.~.~.~ Pyrimidines (including hydrogenated) (e.g., cytosine, etc.) {1}
50  DF  .~.~.~.~.~> 2,4-diketone pyrimidine or derivative (e.g., uracil, etc.) {1}

DEFINITION

Classification: 514/49

Pyrimidines (including hydrogenated) (e.g., cytosine, etc.):

(under subclass 43) Subject matter wherein the hetero ring is a pyrimidine, as illustrated below, or substituted pyrimidine. [figure]

(1) Note. The above structure shows the position numbering used for 1, 3-diazines.