2-iodocyclopent-2-en-1-one

methyl 4-(9-borabicyclo[3.3.1]nonan-9-yl)butanoate

6,9-dioxononansaeure-methylester

9,9-dimethoxy-6-oxononansaeure-methylester

2-(γ-methoxycarbonylpropyl)cyclopentanone