. 2021 Aug 13;22(16):8716. doi: 10.3390/ijms22168716

Table 1.

The HPLC-MS/MS data of polyphenols from Gynura procumbens.

Peak No.	Rt (Min)	Formula	Compound	UV Max	[M+H]⁺	MS/MS
1	23.450	C₁₆H₁₈O₉	Chlorogenic acid	330, 322	355	163 (C₉H₆O₃) [M+H-C₇H₁₂O₆]⁺ 145 (C₉H₅O₂) [M+H-C₇H₁₂O₆-OH]⁺ 128 (C₈H₅O₂) [M+H-C₈H₁₃O₇]⁺
2	31.877	C₁₆H₁₄O₅	Oxypeucedanin	320, 250	287	203 (C₁₁H₆O₄) [M+H-C₅H₈O]⁺ 175 (C₁₀H₆O₃) [M+H-C₅H₈O-CO]⁺ 159 (C₁₀H₆O₂) [M+H-C₅H₈O-CO₂]⁺ 131 (C₉H₆O) [M+H-C₆H₈O₃-CO]⁺ 119 (C₈H₆O) [M+H-C₅H₈O-3CO]⁺
3	33.338	C₁₆H₁₄O₄	Isoimperatorin	310, 250	271	203 (C₁₁H₆O₄) [M+H-C₅H₈]⁺ 175 (C₁₀H₆O₃) [M+H-C₅H₈-CO]⁺ 159 (C₁₀H₆O₂) [M+H-C₅H₈-CO₂]⁺ 147 (C₉H₆O₂) [M+H-C₅H₈-2CO]⁺ 119 (C₈H₆O) [M+H-C₅H₈-3CO]⁺
4	39.185	C₁₂H₁₃NO₂	Indol-3-Carboxylic acid	280	162	144 (C₁₂H₁₂NO) [M+H-OH]⁺ 116 (C₁₁H₁₂N) [M+H-OH-CO]⁺
5	40.185	C₁₀H₇NO₃	Kynurenic acid	345, 330, 245	190	173(C₁₀H₆NO₂) [M+H-OH]⁺ 156 (C₁₀H₅NO) [M+H-OH-OH]⁺ 145 (C₉H₆NO) [M+H-OH-CO]⁺
6	43.242	C₉H₈O₄	Caffeic acid	320, 285	181	163 (C₉H₆O₃) [M+H-H₂O]⁺ 146 (C₉H₅O₂) [M+H-H₂O-OH]⁺ 135 (C₈H₇O₂) [M+H-COOH]⁺ 117 (C₈H₅O) [M+H-COOH-H₂O]⁺
7	49.517	C₉H₈O₃	Coumaric acid	300, 275	165	147 (C₉H₆O₂) [M+H-H₂O]⁺ 119 (C₈H₆O) [M+H-H₂O-CO]⁺
8	50.243	C₄₀H₅₆O₂	Lutein	440, 425	569	551 (C₄₀H₅₄O) [M+H-H₂O]⁺ 430 (C₃₁H₄₁O) [M+H-C₉H₁₅O]⁺ 416 (C₃₀H₃₉O) [M+H-H₂O-C₁₀H₁₅]⁺ 135 (C₁₀H₁₅) [M+H-H₂O-C₃₀H₃₉O]⁺
9	50.895	C₁₅H₁₀O₆	Luteolin	350, 268	287	153 (C₇H₄O₄) [M+H-C₈H₆O₂]⁺ 135 (C₇H₂O₃) [M+H-C₈H₆O₂-H₂O]⁺

Rt: retention time.