US PATENT SUBCLASS 514 / 50
.~.~.~.~.~ 2,4-diketone pyrimidine or derivative (e.g., uracil, etc.)

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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  DF  .~.~.~.~ Pyrimidines (including hydrogenated) (e.g., cytosine, etc.) {1}
50.~.~.~.~.~ 2,4-diketone pyrimidine or derivative (e.g., uracil, etc.) {1}
51  DF  .~.~.~.~.~.~> Phosphorus containing

DEFINITION

Classification: 514/50

2, 4-diketone pyrimidine or derivative (e.g., uracil, etc.):

(under subclass 49) Subject matter wherein oxygen atoms are directly double bonded to the 2 and 4 positions of the pyrimidine ring, e.g., [figure] [caption], etc.