Preparation and structural determination of four metabolites of senkyunolide I in rats using ultra performance liquid chromatography/quadrupole-time-of-flight tandem mass and nuclear magnetic resonance spectra

Table 1 The mass data for metabolites of Senkyunolide I (SEI)

Compound	Observed mass (Da)	Calculated mass (Da)	Error (mDa)	Error (ppm)	DBE	Norm	Formula
M1	401.1455	401.1448	0.6	1.5	6.5	0.048	C₁₈H₂₅O₁₀
M2	401.1453	401.1448	0.7	1.7	6.5	0.004	C₁₈H₂₅O₁₀
M3	514.1870	514.1859	1.4	2.7	8.5	2.062	C₂₂H₃₂N₃O₉S
M4	514.1874	514.1859	1.5	2.9	8.5	1.554	C₂₂H₃₂N₃O₉S

ISSN: 2662-7671