Table 4. Identification of Polyphenol Compounds in Hydro-Ethanolic Extracts through Direct ESI-MS/MS Analysis.

peak No	RT (min)	Λmax (nm)	precursor ion (m/z)	fragment ions ESI-MS2 (% base peak)	formula	tentative identification (references)
polyphenol fractions from Xylopia parviflora collected through RP-HPLC
1a	5.46	280, 320	[M – H]−: 353.1	191.0436 (100), 135.0346 (50), 179.0231 (49), 353.0708 (10), 161.0131 (5), 171.0179 (2)	C16H18O9	3-O-caffeoylquinic acid11
1b	10.05	280, 320	[M – H]−: 325.2	325.1698 (100), 183.0000 (90), 184.0070 (8), 119.0405 (6), 197.0153 (4), 239.0614 (2)	C15H18O8	p-coumaric acid 4-O-glucoside12
1c	12.58	280, 320	[M – H]−: 335.1	135.0304 (100), 179.0153 (75), 161.0070 (30), 335.0397 (17), 227.1758 (12), 133.0153 (5)	C16H16O8	5-O-caffeoylshikimic acid13
polyphenol fractions from Aframomum citratum collected through RP-HPLC
2a	13.26	280, 320	[M – H]−: 183.0	168.9883 (100), 138.9895 (45), 139.9964 (27), 165.9728 (25), 183.0102 (7), 166.9802 (5)	C8H8O5	4-O-methyl gallic acid15
2b	24.43	280, 320	[M – H]−: 419.1	419.0892 (100), 197.0243 (78), 182.0025 (55), 139.0250 (37), 180.9949 (22), 179.0156 (10)	C25H24O6	morusin16
2c	25.25	280, 320	[M – H]−: 325.2	325.1694 (100), 183.0000 (90), 197.0146 (9), 119.0402 (7), 184.0079 (8), 225.0426 (4)	C15H18O8	p-coumaric acid 4-O-glucoside12
2d	34.29	280, 320	[M – H]−: 419.1	419.1187 (100), 197.0327 (55), 182.0098 (33), 181.0025 (25), 125.0138 (24), 164.0005 (12)	C25H24O6	morusin derivative16
2e	35.12	280, 320	[M – H]−: 433.1	151.9999 (100), 269.0310 (95), 433.0966 (70), 259.0471 (40), 287.0404 (38), 286.0331 (14)	C21H22O10	naringenin-7-O-glucoside13
2f	42.5	280, 320	[M – H]−: 341.1	89.0160 (100), 59.0085 (90), 341.0941 (80), 119.0256 (60), 179.0444 (53), 206.8386 (33)	C15H18O9	caffeic acid hexose17
2g	44.12	280, 320	[M – H]−: 329.2	329.1975 (100), 171.0839 (40), 211.1107 (35), 139.0973 (22), 229.1196 (20), 139.0973 (18)		homoisoflavonoid derivative18