Fig. 3.

LC-MS/MS structural elucidation of α-CEHC glucuronide and γ-CEHC Glc in mouse urine. MS/MS fragmentation was conducted with collision energy ramping from 5 to 35 eV. Major daughter ions from fragmentation were interpreted in the inlaid structural diagrams. A: MS/MS spectrum of authentic α-CEHC glucuronide and α-CEHC glucuronide of mouse urine in positive ion mode. B: MS/MS spectrum of authentic α-CEHC glucuronide and α-CEHC glucuronide of mouse urine in negative ion mode. C: MS/MS spectrum of authentic γ-CEHC Glc and γ-CEHC Glc of mouse urine in positive ion mode. D: MS/MS spectrum of authentic γ-CEHC Glc and γ-CEHC Glc of mouse urine in negative ion mode.