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Suppose we have a chemical compound like ethyl 4-oxo-2-cyclopentene-1-carboxylate

Ethyl 4-oxo-2-cyclopentene-1-carboxylate

It is $\ce{-COOC2H5}$ bonded to a five-membered carbon ring with one double bond and the ring has another carbonyl group.

Suppose this compound is made to react with these reducing agents:

  1. $\ce{NaBH4}$
  2. $\ce{LiAlH4}$ and $\ce{H+}$
  3. $\ce{BH3}$, $\ce{THF}$, and $\ce{H+}$
  4. $\ce{H2/Pt}$
  5. $\ce{H2/Pd-C}$

Then what will be the product in each cases?

I know some of the reducing agents and I want to know their reactions with a compound which is unsaturated and has an ester functionality $\ce{-COOR}$ and a carbonyl group $\ce{R2C=O}$ bonded to it.
I cannot try to understand it due to my limited knowledge in chemical mechanisms.

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