4-(Acetylamino)-2-(p-cumenyl)-7-methoxy-5H-[1]benzopyrano[4,3-d]pyrimidin-5-one

       ppm   Int.  Assign.

      170.37   341      1
      166.23   156      2
      160.47   271      3 *
      159.75   176      4 *
      158.82   215      5
      153.64   271      6
      147.21   344      7
      142.21   124      8
      133.96   315      9
      129.26   815     10
      126.81   844     11
      125.15   418     12
      118.66   318     13
      117.03   326     14
      116.22   371     15
       98.23   162     16
       56.60   403     17
       33.47   435     18
       26.42   509     19
       23.40  1000     20