Table 1.

Screening parameters of the compounds in ZJF by HPLC-MS/MS.

Compounds	t R a (min)	m/z [M]+	m/z [M + H]+
1	20.87		355.3
2	24.60		342.6
3	27.74		340.5
4	28.76	424.0
5	31.56	322.2b
6	34.27	338.3
7	34.95	336.2
8	35.12	338.3
9	36.90	302.4
10	38.18	320.2
11	40.47	352.3
12	44.71	336.2
13	65.66	471.8
14	68.55		304.4
15	70.58		288.4

^aTimes of retention. ^b[M-HCHO]⁺.