. 2023 Jun 7;90(1-2):83–98. doi: 10.1007/s10493-023-00804-4

Table 2.

Phenolic compounds identified from Clerodendrum viscosum with the HPLC coupled with quadrupole time-of-flight high resolution mass spectrometry (HPCL-ESI-QToF) method in negative and positive ionization mode

t_R (min)	Identified compound	Formula	Mass experimental	Mass calculated	Error (ppm)	[M-H]⁻ m/z	[M + H]⁺ m/z	MS-MS fragments	Presence in flower/leaves/both	References
4.90	Glucaric acid	C₆H₁₀O₈	210.0376	210.0376	0.13	209.0303		115.0034	Both	Fernández-Poyatos et al. 2019
5.08	Gluconic acid	C₆H₁₂O₇	196.0583	196.0583	0.09	195.0510		159.0270, 129.0191, 105.0163	Both	Felipe et al. 2014
6.02	Fumaric acid	C₄H₄O₄	116.0110	116.0111	1.36	115.0036		105.2635, 74.6429	Leaves	Sinha et al. 1981; Nandi and Lyndem 2016
6.15	Quinic acid	C₇H₁₂O₆	192.0634	192.0631	-1.27	191.0541		111.0078, 57.0343, 87.008	Both	Llorent-Martínez et al. 2015
31.51	p-Coumaric acid glucoside	C₁₅H₁₈O₈	326.1001	326.0997	-1.31	325.0927		163.0397, 119.0500	Leaves	Simirgiotis et al. 2015; Saha et al. 2018
48.20	Apigenin glucuronide	C₂₁H₁₈O₁₁	446.0849	446.0846	-0.71	445.0775		269.0456, 175.0228	Flower	Uddin et al. 2020; Srivastava et al. 2021
54.82	Acacetin glucuronide	C₂₂H₂₀O₁₁	460.1006	460.1021	3.48	459.2945		283.0640, 268.0405, 113.0253	Flower	Sinha et al. 1981; Uddin et al. 2020; Srivastava et al. 2021
58.72	Apigenin	C₁₅H₁₀O₅	270.0528	270.0533	1.9	269.0463		151.0040, 117.0350	Flower	Srivastava et al. 2021
8.50	Caffeic acid	C₉H₈O₄	180.0422	180.0420	-1.4		181.0493	108.0305, 82.0494, 65.0447	Leaves	Dantas et al. 2015; Saha et al. 2018
48.69	Arbutin	C₁₂H₁₆O₇	272.0896	272.0891	-1.83		273.0963	255.1739, 240.1513, 225.1267	Both	Chen et al. 2014