Table 2 Identification of phenolic compounds from various leaf materials by UHPLC/ESI‐HR‐QTOFMS.

From: Leaf Disc Assays for Rapid Measurement of Antioxidant Activity

Leaf material	Rt (min)	UV λ_max (nm)	Experi-mental mass (m/z)	MS/MS fragments	Compound	Molecular formula	Theoretical mass (m/z)	Mass error (ppm)	ref.
Spinach	11.8	255, 350	789.2270	333	Patuletin-3-O-β-D-glucopyranosyl-(1 → 6)-[β-D-apiofuranosyl-(1 → 2)]-β-D-glucopyranoside	C₃₃H₄₀O₂₂	789.2083	−9.5	²⁵
	12.3	255, 350	657.1630	347, 333	Patuletin-3-O-β-D-glucopyranosyl-(1 → 6)-β-Dglucopyranoside	C₂₈H₃₂O₁₈	657.1661	−4.7	²⁵
	12.8	255, 350	803.2190	421, 347	Spinacetin-3-O-β-D-glucopyranosyl-(1 → 6)-[β-D-apiofuranosyl-(1 → 2)]-β-D-glucopyranoside	C₃₄H₄₂O₂₂	803.2240	−6.3	²⁵
	18.0	254, 278, 340	521.0931	345, 330	5, 3, 4 -Trihydroxy-3-methoxy-6:7-methylendioxyflavone-4 - β-D-glucuronide	C₂₃H₂₀O₁₄	521.0926	1.0	²⁵
Kale	8.4	254, 340	789.2081	425, 347, 303, 204, 132, 84	Quercetin-3-diglucoside-7-glucoside	C₃₃H₄₀O₂₂	789.2084	−0.4	^{22, 23}
	8.9	258, 338	773.2136	347, 287, 186, 132, 84	Kaempferol-3-diglucoside-7-glucoside	C₃₃H₄₀O₂₁	773.2135	0.1	^{22, 23}
	9.2	258, 338	934.2633	633, 571, 449, 347, 287, 84	Kaempferol-3-diglucoside-7-diglucoside	C₃₉H₅₀O₂₆	934.2585	5.2	^{22, 23}
Collards	8.9	268, 344	773.2206	541, 347, 287	Kaempferol-3-diglucoside-7-glucoside	C₃₃H₄₀O₂₁	773.2135	9.2	^{21, 22}
	9.5	253, 268, 338	965.2561	449, 355, 287, 193, 133, 84	Kaempferol-3-hydroxyferuloyldiglucoside-7-glucoside	C₄₃H₄₈O₂₅	965.2557	0.4	^{21, 22}
	9.7	338	935.2561	409, 287, 163, 84	Kaempferol-3-caffeoyldiglucoside-7-glucoside	C₄₂H₄₆O₂₄	935.2451	11.7	^{21, 22}
	10.1	338	965.2590	409, 303	Quercetin-3-O-feruloyldiglucoside-7-glucoside	C₄₃H₄₈O₂₅	965.2557	3.4	^{21, 22}
	10.5	254, 268, 334	1111.3239	949, 532, 449, 287, 177, 84	Kaempferol-3-feruloyltriglucoside-7-glucoside	C₄₉H₅₈O₂₉	1111.313	9.2	^{21, 22}
Mustard	8.9	268, 344	773.2206	541, 347, 287	Kaempferol-3-diglucoside-7-glucoside	C₃₃H₄₀O₂₁	773.2135	9.2	^{21, 22}
	9.5	253, 268, 338	965.2625	449, 355, 287, 193, 161, 133, 84	Kaempferol-3-hydroxyferuloyldiglucoside-7-diglucoside	C₄₃H₄₈O₂₅	965.2557	7.0	^{21, 22}
	9.7	253, 268, 338	935.2463	409, 287, 163, 135, 84	Kaempferol-3-caffeoyldiglucoside-O-glucoside	C₄₂H₄₆O₂₄	935.2451	1.2	^{21, 22}
	10.1	253, 338	965.2590	409, 303	Quercetin-3-O-feruloyldiglucoside-7-O-glucoside	C₄₃H₄₈O₂₅	965.2557	3.4	^{21, 22}
	10.5	253, 268, 334	611.1577	287	Kaempferol-3-diglucoside	C₂₇H₃₀O₁₆	611.1606	−4.8	^{21, 22}
	10.8	268, 338	641.1695	317	Isorhamnetin-3-diglucoside	C₂₈H₃₂O₁₇	641.1712	−2.7	^{21, 22}
	14.8	254, 266, 352	479.1155	317	Isorhamnetin-3-glucoside	C₂₂H₂₂O₁₂	479.1184	−6.1	^{21, 22}
Watermelon	7.5	246, 330	707.2320	365, 163, 89	Unknown	—	—	—	—
	8.5	n.d.	827.3534	425, 319, 157, 107	Unknown	—	—	—	—
	15.7	250, 332	587.2183	319, 163, 107, 89	Unknown	—	—	—	—

n.d.- indicates not detecte.

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Table 2 Identification of phenolic compounds from various leaf materials by UHPLC/ESI‐HR‐QTOFMS.

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