Answer
The alkene structure is shown in the diagram. It would be 1-ethyl-2-methylcyclopentene.
Work Step by Step
When ozonolysis takes place the double bond breaks and an O is attached. Thus, while finding the starting molecule, join the two parts with double bonded oxygens to each other. When there is only one product after ozonolysis, the starting material is a ring. When there are two products formed, the starting material is a chain.
When the oxygens in the given product are joined together it forms a cyclopentene with a methyl and an ethyl on it.
