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. Author manuscript; available in PMC: 2013 Nov 1.

Published in final edited form as: Anal Biochem. 2012 Jul 31;430(1):4–15. doi: 10.1016/j.ab.2012.07.022

Fig. 6 — Representative chromatograms from the GC-MS/MS analysis of AECK-DD in urine samples of two healthy volunteers: subjects #18 (A) and subject #7 (B). The concentration of ¹³C₂-AECK-DD (IS) was 250 nM in each sample. The concentration of AECK-DD calculated to be present in these urine specimens were <LOQ and 3.31 nM, respectively.

Fig. 6 — Representative chromatograms from the GC-MS/MS analysis of AECK-DD in urine samples of two healthy volunteers: subjects #18 (A) and subject #7 (B). The concentration of ¹³C₂-AECK-DD (IS) was 250 nM in each sample. The concentration of AECK-DD calculated to be present in these urine specimens were <LOQ and 3.31 nM, respectively.