Answer
The IUPAC name of the compound is $2-methylbutane-1,4-dioic acid$. The common name of the compound is $α-methylsuccinic \hspace1mm acid$
Work Step by Step
The acid has 4 carbon atoms in its longest carbon chain containing the carboxylic functional group. It has 2 $COOH$ groups at position 1 and 4, and a $methyl$ substituent at position 2. So, the IUPAC name of the compound is $2-methylbutane-1,4-dioic acid$. The common name of the compound is $α-methylsuccinic \hspace1mm acid$
