Table 5.

Marker metabolites in G. rhodantha

Peak No.	Rt (min)	precursor ion ( m/z )	CE (eV)	MS/MS fragment (Relative abundance %)	Identity	Ref
4	4.2	423.30 [M-H]−	−24	423 (24) 261 (100) 151 (32) 125 (8)	rhodanthenones B	[20]
		425.20 [M + H] +	−13	425 (18) 263 (100) 145 (19) 127 (8)
7	5.1	375.10 [M-H]−	22	213 (100)	loganic acid*
9	5.5	405.15 [M + H]+	−16	405 (31) 378 (12) 243 (100) 211 (63)	secoxyloganin	[19]
		449.20 [M + HCOO]−	21	449 (27) 403 (22) 359 (26) 241 (100) 197 (29) 179 (77) 161 (18) 144 (17) 127 (15)
10	5.9	413.30 [M + Na]+; 389.20 [M-H]−	25	389 (21) 345 (11) 227 (22) 209 (8) 183 (23) 165 (31) 139 (34) 121 (100) 113 (48) 95 (28)	secologanoside	[19]
12	6.6	419.15 [M + HCOO]−	15	179 (100)	swertiamarin*
		375.10 [M + H]+	−12	195 (100), 177 (63)
14	7.4	421.25 [M-H]−	30	301 (100), 331 (71)	mangiferin*
—	7.5	401.10 [M + HCOO]−	20	355 (23) 179 (100)	gentiopicroside*
15	7.9	403.20 [M + HCOO]−	21	357 (29) 195 (32) 125 (100)	sweroside*
20	10.9	449. 10 [M + H]+ 447.20 [M-H]−	−15	449 (13) 431 (47) 413 (65) 383 (43) 359 (22) 329 (100)	isoorientin	[21,24]
27	10.5	1075.40 [M-H]−; 1099.10 [M + Na]+	35	1075 (51), 913 (59) 555 (100) 357 (28) 197 (32) 153 (31)	unknow	[17,18]
28	10.8	1433.30 [M-H]−; 1452 [M+ NH4]+	32	1433 (17) 1271 (100) 1075 (43) 913 (84) 555 (100) 197 (20) 153 (17)	unknow	[17,18]
29	18.0	913 [M-H]−; 937.13 [M + Na]+	39	913 (14), 555 (55), 357 (12), 197 (100) 153 (61) 109 (18)	rhodenthoside A	[17,18]
30	18.1	1629 [M-H]−; 1648 [M + NH4]+	63	1629 (7) 1271 (37) 913 (93) 555 (100) 197 (29) 153 (18)	rhodenthoside B	[17,18]
31	18.5	1643 [M-H]−; 1667 [M + Na]+	55	1643 (27) 1285 (100) 1271 (33) 927 (36) 913 (53) 555 (37) 197 (29) 153 (22)	unknow	[17,18]
32	18.9	1657 [M-H]−; 1681 [M + Na]+	59	1657 (41) 1285 (32) 927 (73), 913 (31) 555 (74) 197 (33) 153 (100) 109 (29)	rhodenthoside C	[17,18]

*identification by standard compounds.

—: not detect in chromatogram.