Table 2. Chemical constituents of RSE identified through liquid chromatography-high resolution mass spectrometry.

Peak	Rt(min)	MS-Mol. wt.+H	Actual Mol. wt.+H	Formula	Constituents
1	3.30	435.1387	435.1359	C20H22N2O9	Glucodichotomine B
2	3.362	273.0850	273.0875	C14H12N2O4	Dichotomine B
3	4.070	257.0919	257.0926	C14H12N2O3	β-carboline alkaloid
4	7.59	384.1195	384.1151	C19H17N3O6	Dichotomine H
5	9.238	369.1425	369.1450	C20H20N2O5	Dichotomine L
6	7.614	254.0919	254.0930	C14H11N3O2	Stellarine A
7	8.190	338.1138	338.1141	C18H15N3O4	Stellarine B
8	8.940	269.0920	269.0926	C15H12N2O3	Stellarine C
9	3.793	153.0562	153.0552	C8H8O3	Vanillin
10	2.058	127.0392	127.0395	C6H6O3	5-Hydroxymethylfurfural

Notes.

Rt

retention time (min)

MS-Mol

wt.+H: primary mass spectrometry

Actual Mol

wt.+H: actual molecular weight