Optimization of Phenolic Compound Extraction from Chinese Moringa oleifera Leaves and Antioxidant Activities

Table 5

HPLC-ESI-MS data of the compounds identified in ME.

Peak	RT (min)	[M-H]^- (m/z)	Fragment (m/z)	Compound	Molecular formula	Content (%)
1	10.7	611.9	369.9 258.7 290.7	Unknown	Unknown	1.92
2	11.4	353.0	190.7 134.7	3-Caffeoylquinic acid	C16H18O9	46.93
3	13.7	336.9	162.7 176.7 118.7	Coumaroylquinic acid isomer 1	C16H18O8	1.53
4	14.1	337.0	162.9 118.7 190.7	Coumaroylquinic acid isomer 2	C16H18O8	3.83
5	15.4	352.8	190.7	Caffeoylquinic acid isomer 1	C16H18O9	1.94
6	16.1	352.8	172.7 134.7	4-Caffeoylquinic acid	C16H18O9	14.37
7	19.2	336.8	190.7 172.7	Coumaroylquinic acid isomer 3	C16H18O8	0.77
8	20.0/20.1	593.0	473.0 352.9	6,8-Di-c-glucosyl apigenin	C27H30O15	3.83
9	24.7	430.9	310.7 340.8 282.7	Apigenin glucoside isomer 1	C21H20O10	0.76
10	26.2	430.8	310.8 340.8 412.8	Apigenin glucoside isomer 2	C21H20O10	0.96
11	27.7	462.9	300.9	Quercetin-3-O-β-D-glucoside	C21H20O12	5.75
12	29.1	505.1	300.9 462.9	Quercetin-acetyl-glycoside	C23H22O13	10.54
13	31.3	446.9	284.9	Kaempferol-3-O-glucoside	C21H20O11	2.11
14	33.2	489.0	284.9	Kaempferol-acetyl-glycoside	C23H22O12	4.79