TABLE 1.

Electrospray ionization-liquid chromatography/mass spectrometry mass spectral data for metabolites of ETR

Metabolite	[M − H]+	Fragment Ions
M1	451	371, 333, 306, 304, 289, 210, 186, 172, 163, 161, 146, 144, 119
M2	451	371, 353, 306, 304, 289, 225, 210, 188, 172, 163, 161, 146, 144, 120
M3	451	353, 339, 311, 252, 210, 196, 144
M4	467	369, 352, 323, 288, 226, 208, 183, 144
M5	467	369, 355, 226
M6	467	369, 355, 226
M7	627	451, 433, 372, 353, 333, 289, 163