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Write the products (more than one) for the hydrogenation of the cycloalkene ring in (3⁠R,4⁠R,5⁠S)-4,5-diamino-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylic acid. Reagents are molecular hydrogen with Pt catalyst.

My problem here is that the question implies there are several products for hydrogenation of the cycloalkene. I only see one product, where each end of the alkene obtains a hydrogen, and the pi bond is gone. How can a hydrogenation of this alkene result in more than one product?

Why is there more than one product?

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Hydrogenation of the alkene introduces a stereo centre, thus the products are:

The products!

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