On treatment with a Grubbs’ olefin metathesis catalyst, the compound shown reacted with st...

On treatment with a Grubbs’ olefin metathesis catalyst, the compound shown reacted with styrene to give a 95% yield of a product with the molecular formula C₂₅H₃₀O₃, which was later used in the synthesis of a metabolite isolated from a species of mollusk. Suggest a reasonable structure for the metathesis product.