Table 4.

Summarization of mass spectra data of flavonoids and polyphenols in EAW.

Peak	Retention Time (min)	[M − H]−	Mass Fragmentation	Compound Name	References
1	1.11	195	177, 147, 129, 111, 99, 75	Gluconic acid	Li et al. [19] Felipe et al. [20]
2	1.52	191	173, 171, 127, 109, 93, 85, 65	Quinic acid	Fathoni et al. [21]
3	1.78	179	135, 107, 89, 59	Caffeic acid	Li et al. [19]
4	2.86	353	191, 179, 161, 135, 93, 85	Chlorogenic acid	Li et al. [19]
5	4.04	515	353, 85, 93, 135, 173, 179, 191, 161	3,4-Dicaffeoylquinic acid	Simirgiotis et al. [22]
6	4.34	461	285, 133, 151, 175	Luteolin-7-O-glucuronide	Li et al. [19]
7	4.95	475	299, 284, 211, 227, 255	Hispidulin-7-O-glucuronide	Li et al. [19]
8	7.11	285	241, 217, 199, 175, 151, 133	Luteolin	Fathoni et al. [21]

Various phenolic acids and flavonoids in Erigeron annuus (L.) Pers. water extract (EAW) were determined by comparing retention time and mass spectra with reference standards. Peak number, refer to Figure 6.