IUPAC name of the compound is according to the IUPAC rules. Here, the rules which will be applied are as follows-

Find and name the longest possible chain.

The numbering of the identified longest possible chain is based on the priorities.

The suffix in the name of a compound is based on the most priority group in that compound.

Based on these rules, IUPAC name of the compound given is 4-Methylhept-5-ene-2-one