Table I.

MS/MS data of the polyphenols in Artemisia iwayonogi (Dowijigi).

Peak no.	Compound	Retention time (min)	UV max, nm	[M-H]−	MS/MS	(Refs.)
1	Protocatechuic aldehyde	12.866	278, 310	137	109	(40)
2	Gallocatechin	14.713	272	305	261, 221, 219, 179	(41)
3	Methyl catechin	18.337	272	305	137	(42)
4	Epicatechin	19.460	272	305	139	(42)
5	Caffeic acid	19.979	323	179	135	(43)
6	Epigallocatechin	26.570	272	305	261, 221, 219, 179	(41)
7	Catechin	27.003	272	289	245, 205	(41)
8	5-caffeoylquinic acid	27.718	284	353	191	(41)
9	Epigallocatechin-3-gallate	28.929	294	457	331, 305, 169	(41)
10	5-Feruoylquinic acid	30.802	272	367	193, 191, 173	(44)
11	Rhamnose-C-acetyl-hexoside apigenin	31.828	344	619	499, 457, 413, 341, 311, 293, 315	(45)
12	Liquiritigenin-7-O-sulfate	33.610	342	335	255, 135, 119	(46)
13	Quercetin-rutinoside	35.853	254, 352	609	301	(41)
14	Quercetin-3-galactoside	36.234	254, 370	463	301	(47)
15	Quercetin-3-glucoside	37.718	256, 354	463	301	(47)
16	Malyidin-3-glucoside	38.211	256, 354	493	331	(48)
17	3,4-di-O-Caffeoylquinic acid	40.702	326, 300	515	353, 335, 191, 179, 173	(49)
18	3,5-di-O-Caffeoylquinic acid	42.525	328, 300	515	353, 354, 191, 179	(9)
19	Quinic acid derivate	45.298	324, 226	515	353, 335, 191, 179, 173	(50)
20	4,5-di-O-Caffeoylquinic acid	45.929	326, 300	515	353, 335, 317, 299, 191, 179, 173	(49)
21	Mearnsetin-O-diglucoside	47.971	330	655	535, 493, 492, 331, 329, 316, 301	(50)
22	Quercetin diglycoside	51.437	330	771	609, 463, 608, 301, 300	(49)
23	Quercetin dihexoside	53.260	354	625	463, 301	(45)
24	Caffeoyl dihexoside	53.816	328	503	342, 341, 179	(49)
25	3-Caffeoyl-4-feruoyl-quinic acid	56.817	322, 286	529	367, 353, 255, 203, 191, 179, 173	(50)
26	Luteolin	58.962	358, 254	285	133	(51)
27	Isorhamnetin	59.497	344, 268	315	300	(51)
28	5,7,4′,5′-Tetrahydroxy-6,3′-Dimethoxyflavone	59.991	348, 270	345	330, 315, 287, 259, 136	(44)
29	Mearnsetin-glu	67.527	335, 265	493	478, 331, 330, 316, 315	(50)
30	Gliricidin	68.182	330, 272	299	284, 271, 256, 212, 175	(52)
31	Kaempferol methylether	68.523	348, 266	299	285, 255, 227	(45)
32	5,7,3′-Trihydroxy-6,4′-dimetoxyflavone	69.006	343, 272	329	314, 299	(47)
33	5,7,3′-Trihydroxy-6,4′-dimetoxyflavone	70.197	343, 272	329	314, 299	(47)
34	5,7,3′-Trihydroxy-6,4′-dimetoxyflavone	72.526	343, 272	329	314, 299	(47)
35	3-Hydroxy-6,7,4′-trimethoxy flavone	74.865	336, 247	343	328, 327, 313, 261	(50)
36	Quercetagetin-tetramethyl ester	75.648	354, 272	373	358, 343, 328, 313	(47)
37	Genkwanin	77.049	335, 268	283	268	(47)

MS/MS, tandem mass spectrometry. [M-H], M; Main structure and H; Hydrogen ion.