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. Author manuscript; available in PMC: 2017 Jan 20.
Published in final edited form as: Environ Int. 2015 Feb 17;78:16–23. doi: 10.1016/j.envint.2015.01.016

Fig. 1.

Fig. 1

Proposed metabolic pathway of fipronil in the rat. M4 and M7 are proposed structures based on MS data, isotope distributions, and exact mass. M1, M2, M3, M5, and M6 were identified in rat urine. Unobserved metabolites labeled (UM) were not identified but are likely intermediates.