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. Author manuscript; available in PMC: 2012 Jul 25.
Published in final edited form as: J Agric Food Chem. 2010 Sep 8;58(17):9384–9395. doi: 10.1021/jf904561e

Table 2.

Diagnostic shift in Band I and II of the 7-O-glucuronides in relation to corresponding aglycone

Compound Aglycone or
Glucuronide
(O-G)		 λmax, nm Diagnostic
shifts in Band I
and II in relation
to aglycones		 Figure
number
in SI
Band II Band I
7HF Aglycone 253.5 310.3 2.17
7-O-G 253.5 310.3 No change 2.17
7H4’MF Aglycone ND* 329.4 2.18
7-O-G ND* 329.4 No change 2.18
3,7DHF Aglycone 253.5 338.9 2.22
7-O-G 248.8 338.9 No change (Band I)
−4.7 nm (Band II)		 2.22
5,7DHF Aglycone 267.7 310.3 2.25
7-O-G 267.7 310.3 No change 2.25
6,7DHF Aglycone 267.7 319.9 2.27
7-O-G 267.7 319.9 No change 2.27
7,4’DHF Aglycone ND* 334.1 2.28
7-O-G 253.5 334.1 No change 2.28
5,7DH8MF Aglycone 272.4 343.7 2.31
7-O-G 272.4 343.7 No change 2.31
Apigenin Aglycone 267.7 338.9 2.32
7-O-G 267.7 338.9 No change 2.32
Galangin Aglycone 262.9 357.8 2.33
7-O-G 262.9 357.8 No change 2.33
Resokaempferol Aglycone 253.5 353.2 2.35
7-O-G 253.5 353.2 No change 2.35
Kaempferol Aglycone 262.9 366.1 2.36
7-O-G 262.9 366.1 No change 2.36
*

ND means not detected by the Empower software in the spectra