Alkaloids in Erythrina by UPLC-ESI-MS and In Vivo Hypotensive Potential of Extractive Preparations

Table 2

Chemical constituents of E. falcata and E. crista-galli identified by UPLC-MS with correspondent retention times, quasi-molecular ions in positive mode, and key fragments.

Species	Rt (min)	Molecular formula	[M+H]^+ (m/z)	MS fragmentation; M+H^+ (m/z)	Compound
E. falcata
1	11.72	C20H25O4N	344	316, 299	Erythristemine
2	12.17	C25H33O9N	492	478, 316, 299	11β-Methoxyglucoerysodine
3	12.95	C19H21O7NS	408	348, 316	Erysothiopine
4	13.58	C24H31O9N	478	316, 299	11β-Hydroxyerysodine-glucose
5	13.94	C24H31O9N	478	316, 299	11-Hydroxyerysotinone-rhamnoside
E. crista-galli
1	11.5	C20H25O4N	344	316, 299	Erythristemine
3	12.94	C19H21O7NS	408	349, 332, 316	Erysothiopine
4	13.42	C24H31O9N	478	316, 299	11β-Hydroxyerysodine-glucose
5	13.81	C24H31O9N	478	332, 316, 299	11-Hydroxyerysotinone-rhamnoside