. 2020 Jun 28;10(7):267. doi: 10.3390/metabo10070267

Table 5.

Phytoestrogens from pasture legume species identified in this study by LC-MS-QToF in positive ionization mode.

Name	Molecular Formula	M + H	Basis for Identification ^a
Isoflavones
Daidzein	C₁₅H₁₀O₄	255.0652	STD
Formononetin	C₁₆H₁₂O₄	269.0808	STD
Genistein	C₁₅H₁₀O₅	271.0601	STD
Coumestans
Coumestrol	C₁₅H₈O₅	269.0444	STD
4′-methoxycoumestrol	C₁₆H₁₀O₅	283.0579	AM

^a Basis for identification codes: AM [43,44]—match to accurate mass/molecular formula and MS/MS spectra; STD—match to accurate mass and retention time of analytical standards.