Table 2. Identification of main compounds of ethyl acetate fraction from Lonicera japonica

No.	RT1) (min)	Parent ion2) (m/z)	MSE fragment3) (m/z)	Compound
1	4.53	353.08	191.05	Chlorogenic acid
2	5.06	433.13	300.03, 301.03	Quercetin pentosiede
3	5.12	447.09	285.03	Luteolin-7-glucoside
4	5.21	515.11	353.08, 173.04	3,4-Dicaffeoylquinic acid
5	5.28	515.12	353.08, 191.05	1,3-Dicaffeoylquinic acid
6	5.36	515.12	353.08, 191.05, 173.04	1,4-Dicaffeoylquinic acid

RT means retention time.
Ions are presented at m/z [M-H]^-.
Bold indicates the main fragment of MS^E.