Table 1.

The MS/MS data of standard compounds.

T R (min)	Formula	Name	[M-H]− found at mass	[M-H]− error (ppm)	MS/MS fragment ions in negative mode	[M+H]+ found at mass	[M+H]+ error (ppm)	MS/MS fragment ions in positive mode
12.49	C59H96O26	Hederacoside C	1219.6110	−0.40	749.4487	1221.6313	3.68	1075.5653 943.5211 797.4660 635.4156 473.3614 455.3492 437.3389 427.3564 409.3441 391.3317
20.41	C41H66O12	α-hederin	749.4473	−0.16	603.3907 471.3473	751.4634	0.13	605.4065 473.3609 455.3494 437.338 427.3567 409.3457 391.3351