Table 2.

Metabolites identified by LC–MS in negative ionisation mode present in Bambara groundnut seed methanolic extracts.

Peak	Rt (min)	λmax (nm)	[M–H]−	Formula	Error (mDA)	[M–H]− fragments	Tentative identification	Classification
1	7.66	260	495.137	C19H27O15	3	485, 323, 125, 101	Unknown
2	8.28	Weak	305.088	C12H17O9	2.3	259	Starch acetate	Oligosaccaride
3	8.37	Weak	421.135	C17H25O12	0	259, 161	Lamiide	Monoterpenes (Iridoid O-glycoside)
4	9.20	278	451.126	C21H24O11	1.5	289, 245, 134	Catechin hexoside	Flavonoid
5	9.74	Weak	205.071	C8H13O6	4.2	187, 151	Diethyl tartrate	beta hydroxy acids and derivatives
6	10.67	280	577.135	C30H25O12	0.9	407, 289, 161	Procyanidin dimer B1	Flavonoid
7	11.07	Weak	485.187	C19H34O14	− 2.5	409, 455	Caffeic acid derivative	Phenolic acid
8	11.32	270	451.124	C21H23O11	− 0.2	289, 245	Catechin hexoside	Flavonoid
9	11.92	Weak	323.134	C13H23O9	− 1.9	252, 161	Beta-d-glucosyl-(1->3)-alpha-l-fucosyl	O-Glycosyl compounds
10	12.06	Weak	691.177	C35H31O15	− 3.6	572, 447, 323, 281, 259	UNPD69159	Neolignans and related compounds
11	13.69	Weak	387.164	C18H27O9	− 3.4	207	Medioresinol	Lignan
12	15.87	353	609.147	C27H29O16	2.1	300, 271	Quercetin 3-galactoside 7-rhamnoside	Flavonoid
13	16.32	Weak	381.191	C20H29O7	1.3	337, 291	Caffeic acid derivative	Phenolic acid
14	17.82	350	463.089	C21H19O12	2.2	300, 271, 255	Quercetin hexoside	Flavonoid
15	23.89	250	655.299	C36H46NO11	− 0.26	551, 313, 143	UNPD205773	O-Glycosyl compounds

Rt retention time.