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Table 2 Tentative identification of the chemical constituents of Erdong decoction by UHPLC- MS in the positive mode

From: The combination of UHPLC-HRMS and molecular networking improving discovery efficiency of chemical components in Chinese Classical Formula

Peak no. TR (min) Formula Adduct ion Experimental mass m/z Theoretical mass m/z Mass error (ppm) Fragment ions Identification Source
114 6.43 C19H23NO3 [M+H]+ 314.1746 314.1751 − 1.433 283.1324, 252.1144, 189.0908, 174.0670, 145.0645, 107.0494 Armepavine N
115 6.89 C18H21NO3 [M+H]+ 300.1591 300.1594 − 1.100 283.1324, 252.1143, 189.0909, 174.0671, 145.0647, 107.0494 NorarMepavine N
116 9.06 C18H19NO3 [M+H]+ 282.1485 282.1489 − 1.366 251.1062, 236.0828, 219.0801, 191.0853 O-Nornuciferine N
117 10.84 C38H44N2O6 [M+H]+ 625.3267 625.3272 − 0.885 566.4268, 489.2368, 325.0908, 206.1174, 163.0388, 121.0649 Dauricine N
118 12.78 C17H15NO2 [M+H]+ 266.1172 266.1176 − 1.485 249.0906, 219.0801, 191.0853 Anonaine N
119 12.82 C18H19NO2 [M+H]+ 282.1486 282.1489 − 0.834 265.1219, 250.0984, 234.1036 N-Methylnuciferine N
120 12.96 C18H17NO2 [M+H]+ 280.1330 280.1332 − 0.840 249.0907, 219.0803, 191.0854, 149.0233 Roemerine N
121 13.07 C19H21NO2 [M+H]+ 296.1643 296.1645 − 0.255 265.1218, 250.0984, 234.1035 Nuciferine N
122 14.2 C19H21NO3 [M+H]+ 312.1591 312.1594 − 0.300 265.1219, 250.0986, 234.1033 Pronuciferine N
123 16.96 C20H21NO4 [M+H]+ 340.1539 340.1543 − 1.278 269.1166, 233.1045, 215.0938, 197.0836, 178.0864 Tetrahydroberberine THB N
  1. N: Nelumbinis folium