... 126 .55, 126 .47, 126 .36, 126 .31, 126 .18, 126 .03, 125 .97, 125 . 92, 125 .84, 125 .35, 125 .13, 63 124 .99, 124 .88, 124 .84, 124 .68, 124 .43, 123 .10, 64.46, 63 .26 , 63.10, 63.00, 62. 97, 62. 25, 52. 23 HRMS-ESI: ... 131.97, 129 .09, 128 .97, 126 .73, 126 .63, 126 .22 , 125 .79, 125 .05, 124 .71, 124 .59, 124 . 42, 123 .45, 64.45, 63 .23 , 62. 50, 53.38, 52. 30 HRMS-ESI: calculated for [M+Na]+ (C25H23N3O9): m/z 5 32. 1 327 found: ... NMR ( 125 MHz, CDCl3) δ 165.80, 1 62. 86, 161. 42, 151 .21 , 149.19, 147.17, 144 .29 , 136.39, 1 32. 58, 131.86, 129 .20 , 128 .57, 126 .69, 126 .57, 126 .28 , 126 .14, 125 .67, 124 .63, 123 .41, 64.40, 63.07, 62. 37,...