4-Amino-2-(3,4-dimethoxyphenyl)-5H-[1]benzopyrano[4,3-d]pyrimidin-5-one

       ppm   Int.  Assign.

      165.97   460      1
      163.20   512      2
      160.81   383      3
      159.06   220      4
      153.44   468      5 *
      152.49   488      6 *
      148.77   584      7
      133.64   609      8
      129.51   554      9
      125.15   642     10 #
      124.69   656     11 #
      122.74   634     12
      118.22   515     13
      116.76   650     14
      112.36   556     15 *1
      111.70   595     16 *1
       94.87   369     17
       55.83  1000     18
                       19