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Pyridopyrimidine nucleotide compounds

  • US 4,965,350 A
  • Filed: 05/11/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 09/09/1985
  • Status: Expired due to Fees
First Claim
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1. A pyridopyrimidine nucleotide derivative expressed by formula (I):

  • ##STR23## wherein X1 and Y1 each represent ##STR24## (wherein n is an integer of 0, 1, 2, or 3, provided that n is not 0 for both X1 and Y1);

    wherein Z1 represents a hydrogen atom or ##STR25## (wherein m is an integer of 0, 1, 2, or

         3);

    wherein W1 represents a hydrogen atom or a hydroxyl group, provided that Z1 is not ##STR26## when W1 represents a hydroxyl group; and

    wherein R1 represents an amino group or halogen atom and R2 represents a single bond between the carbon atom at the 7-position and the nitrogen atom at the 8-position or R1 represents a carbonyl bond ##STR27## formed with the carbon atom at the 7-position and R2 represents a lower alkyl group.

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