Right, thanks for the pointer!
Yes you're right about the methyl t-butyl ether. The text refers to it as BME, but it's labeled Mtbe in the the lab... why the inconsistency? don't ask a lowly lab rat like me, I'm sure that there was/is a good reason.
Okay so salts to neutralize, good...
In O-Chem lab, after the reaction is complete, NaHC03 and NaCl solutions are added. Then BME is added and aqueous layer removed.
Why do you extract the mixture with salts, and what role does each one play?
trans cinnamic acid + methanol...