. 2021 May 3;22(9):4849. doi: 10.3390/ijms22094849

Table 3.

HPLC-DAD-ESI/MS data [t_R (min), UV ƛ_max (nm), m/z [M+H]⁺/[M-H]⁻/Ag⁺] of compounds identified in tetrahydrofuran extract from D. muscipula obtained in Soxhlet extractor.

Peak Number	t_R	UV (λ_max nm)	MS m/z		Compound [Reference]
Peak Number	t_R	UV (λ_max nm)	[M+H]⁺/[M-H]⁻/Ag⁺	[M+2H]⁺/[M+H]⁻	Compound [Reference]
1	9.4	253, 263sh, 302sh, 357	564⁺/-/-	-	unidentified flavonoid, probably quercetin glycoside
2	10.0	265, 298sh, 357	548⁺/-/-	-	unidentified flavonoid, probably kaempferol glycoside
3	10.8	247, 301sh, 350sh, 363	608⁺/-/-	-	unidentified compound
4	11.31	252, 298sh, 366	303⁺/301⁻	-	ellagic acid [25,27]
5	12.00	240, 290sh, 367	331⁺/329⁻/-	-	dimethylellagic acid isomer
6	12.15	253, 266sh, 300sh, 355	465⁺/-/303⁺	-	hyperoside-quercetin 3-O-galactoside [5,26,27]
7	13.12	260, 289sh, 350sh	631⁻		unknown compound
8	13.25	258, 266sh, 293sh, 357	617⁺/615⁻	-	quercetin-3-(6′′-O-galloyl)-glucoside/galactoside [26,27]
9	15.51	265, 299sh, 351	601⁺/599⁻	-	kaempferol -3-(6′′-O-galloyl)-glucoside [25,26]
10	16.90	249, 300sh, 370	317⁺/315⁻	-	3-O-methylellagic acid [27]
11	22.75	245, 289sh, 374	331⁺/329⁻	-	3,3′-di-O-methylellagic acid [25,27]
12	24.32	267, 346		192⁺/-	dihydroplumbagin [32]
13	31.38	266, 418	-	190⁺/189⁻	plumbagin [5,27]
14	34.17	271, 412		-/223⁻	3-chloroplumbagin [5,27]
15	37.50	276, 414	-	376⁺/-	8,8′-biplumbagin [27]
16	40.90	280, 412	476⁺		unknown naphthoquinone