What is the outcome of the following reaction?

[![](https://i.stack.imgur.com/p4MNf.png)](https://i.stack.imgur.com/p4MNf.png)


The first step is clear to me, making an immine.
However how does the immine react again?
Perhaps it can be reacting with the carbonyl or alkene (to carbonyl over conjugation) I can't get to the target formula. 


