Table 1.

Putative identification of CMD in positive ion mode

No.	Component name	Area	RT	Formula	Precursor mass	Found at mass	Mass error (ppm)
1	l(+)-Arginine	7,402,000	1.14	C6H14N4O2	175.119	175.1187	−1.5
2	Trigonelline	253,900	1.21	C7H7NO2	138.055	138.0551	1
3	Proline	433,800	1.24	C5H9NO2	116.071	116.0707	0.4
4	Glutamic acid	187,400	1.3	C5H9NO4	148.06	148.0606	0.8
5	Betaine	140,700	1.37	C5H11NO2	118.086	118.0863	0.6
6	Nicotinic acid	155,300	1.71	C6H5NO2	124.039	124.0394	0.9
7	Nicotinamide	235,400	1.79	C6H6N2O	123.055	123.0554	0.9
8	Adenosine	2,131,000	2.36	C10H13N5O4	268.104	268.1038	−0.9
9	Cordycepin	43,090	2.42	C10H13N5O3	252.109	252.1093	0.8
10	Guanosine	207,900	2.46	C10H13N5O5	284.099	284.0992	0.7
11	Phenylalanine	1,719,000	3.17	C9H11NO2	166.086	166.0863	0.3
12	Cinnamic acid	48,090	3.18	C9H8O2	149.06	149.0598	0.6
13	4-Hydroxybenzoic acid	12,960	4.73	C7H6O3	139.039	139.039	0.4
14	Esculetin	23,820	5.13	C9H6O4	179.034	179.034	0.6
15	Hyperin	4,621	6.5	C21H20O12	465.103	465.1034	1.4
16	Syringaldehyde	3,442	6.56	C9H10O4	183.065	183.065	−1.1
17	Luteoloside	2,638	6.67	C21H20O11	449.108	449.1091	2.8
18	Isoferulic acid	3,834	6.74	C10H10O4	195.065	195.0652	0.1
19	Narirutin	2,831	7.08	C27H32O14	581.186	581.1873	1.4
20	Neohesperidin	4,766	7.5	C28H34O15	611.197	611.1977	1.1
21	Tiliroside	4,904	8.91	C30H26O13	595.145	595.145	0.7
22	Calycosin-7-O-glucoside	6,176	9.42	C22H22O10	447.129	447.1284	−0.4
23	Nobiletin	31,320	12.77	C21H22O8	403.139	403.1388	0.1
24	Ophiopogonin D′	877,800	14.83	C44H70O16	855.474	855.4731	−0.6
25	Ruscogenin	178,800	14.85	C27H42O4	431.316	431.3154	−0.5
26	Ophiopogonanone C	3,902	15.06	C20H20O6	357.133	357.134	1.9