Table 1: Identification of phenolic compounds in H. tuberosus leaves by HPLC-MS/MS.

Peaks number (min)UV (nm)MWMSMS/MSIdentification

13.58246.0, 263.0360359.4297.3, 281.6, 230.9, 135.2Unknown
24.36214.3, 323.4354353.4191.1, 179.1, 161.1, 135.1, 85.1Caffeoylquinic acid (isomer of chlorogenic acid)
35.78214.4, 327.0354353.4191.1, 127.0, 85.03-o-Caffeoylquinic acid (3-CQA)
46.07237.9, 324.4354353.4191.2, 127, 93.1, 85.0Caffeoylquinic acid
58.57323.0180179.1136.0, 107.9Caffeic acid (CA)
69.19239.1, 311.5338337.3191.1, 173.0, 93.0p-Coumaroyl-quinic acid
710.12241.4, 325.8368367.3191.0, 173.1, 134.0, 93.0Feruloylquinic acid
818.09243.8, 327.0516515.5354.3, 191.1, 173.1, 179.1, 135.0Dicaffeoylquinic acid (3,4-DiCQA)
919.03242.6, 327.0516515.5354.1, 191.2Dicaffeoylquinic acid (3,5-DiCQA)
1020.04327342341.3179.1, 161.1Caffeoyl glucopyranose
1120.43243, 329.4516515.5354.1, 191.1, 179.1, 173.1, 135.1Dicaffeoylquinic acid (1,5-DiCQA)
1222.97253.3, 349.7478477.4315.3, 300.1, 270.9, 180.2Isorhamnetin glucoside
1326.57327.0516515.5191.1, 179.1, 173.1, 135.0Dicaffeoylquinic acid (4,5-DiCQA)
1430.20263.9, 341.3462461.4315.2, 284.8, 161.0, 132.7, 85.1Kaempferol glucuronide
1530.58263.0, 333.0448447.4285.4, 190.8, 153.1, 96.9Kaempferol-3-o-glucoside