Muscone is a 

Concept:

Polyketides:

• Polyketides are a class of natural products derived from a precursor molecule, consisting of a chain of alternative ketone and methylene groups. 
• Polyketides contain large groups of secondary metabolites that either contain a chain of alternative ketone and methylene groups or are derived from precursors which contain such alternating groups.

Explanation:

• Muscone is a natural product of the group polyketide.
• Muscone is an organic compound (natural product) that is a primary contributor to the odor of musk.

​Conclusion:

Hence, Muscone is a ​polyketide.