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. Author manuscript; available in PMC: 2015 Mar 15.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2014 Feb 4;0:62–67. doi: 10.1016/j.jchromb.2014.01.045

Figure 1.

Figure 1

Chemical structure of Amplifex diene reagent used to derivatize 1,25-(OH)2-D3 and -D2. Amplifex improves ionization and enhances sensitivity for molecules that have a cis-diene system.