Which is most likely the acidic proton in ascorbyl palmitate?

The structure of ascrobyl palmitate contains a vinyl group, so I assume the red proton would be:
[![enter image description here](https://i.stack.imgur.com/svvKq.png)](https://i.stack.imgur.com/svvKq.png)




***The other H (hydrogen) will be more acidic***. The ascorbate anion is stabilized by electron delocalization, as I have show below in terms of resonance between two canonical forms. 


[![ascorbate anion resonance](https://i.stack.imgur.com/9QhyG.jpg)](https://i.stack.imgur.com/9QhyG.jpg)


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