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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Biomaterials. 2016 Mar 22;93:1–9. doi: 10.1016/j.biomaterials.2016.03.032

Figure 1.

Figure 1

A. The synthesis scheme of Sali-ABA and Sali-ABA-MPBH. B. An ESI-MS spectrum of a purified reaction product between ABA and Sali. Several major molecular ion peaks are labelled. C. An ESI-MS spectrum of purified reaction product between Sali-ABA and MPBH. The insert is the expected chemical structure of the Sali-ABA-MPBH conjugate. The peak that matches the MW of Sali-ABA-MPBH is evident. The presence of peaks of MPBH and Sali-ABA of this purified conjugate suggests that the hydrazone bond inside the conjugate is not stable under the ESI-MS experimental conditions.