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. Author manuscript; available in PMC: 2015 Jul 15.

Published in final edited form as: Toxicol Appl Pharmacol. 2014 Apr 12;278(2):91–99. doi: 10.1016/j.taap.2014.04.002

LC-MS/MS of the polar metabolite of AGN 3. A. MS scan of the parent AGN 3 thiourea (m/z 263); there appears to be a small amount of contamination with formamidine sulfenic acid; B. MS scan of the major polar metabolite (m/z 279 & 281) identified as the S-oxide-sulfenic acid tautomer; C. MS/MS scan of the AGN 3 sulfenic acid metabolite (m/z 279).

LC-MS/MS of the polar metabolite of AGN 3. A. MS scan of the parent AGN 3 thiourea (m/z 263); there appears to be a small amount of contamination with formamidine sulfenic acid; B. MS scan of the major polar metabolite (m/z 279 & 281) identified as the S-oxide-sulfenic acid tautomer; C. MS/MS scan of the AGN 3 sulfenic acid metabolite (m/z 279).