Table 2.

Identified phenols compounds in X. stuhlmannii leaf extract using UPLC-UV-ESI-TOF-MS.

Compound Number	Retention time (min)	MS (m/z)	Ion adducts	Molecular Formular	Proposed identification	References
1	3.62	387.1077	[M+H]+	C20H18O8	Stuhlmannione A	Mekuete et al. [15]
2	6.11	269.0825	[M+H]+	C16H12O4	Formononetin
3	6.20	493.1872	[M − H]-	C28H30O8	Stuhlmarotenoid A
4	7.35	313.2388	[M − H]-	C17H14O6	9-methoxymaackiain	Mekuete et al. [15]
5	7.54	301.1417	[M+H]+	C16H12O6	4-hydroxymaackiain	Mekuete et al. [15]
6	8.21	265.1479	[M − H]-	C16H10O4	7-hydroxy-3′,4′-methylenedioxy-isoflavone	Mekuete et al. [15]
7	8.32	341.2670	[M+H]+	C19H16O6	Unknown	/
8	8.46	271.2282	[M − H]-	C15H14O5	Unknown	/
9	8.56	297.2446	[M − H]-	C17H14O5	Unknown	/