Methyl (3-oxo-2-pentylcyclopentyl)acetate（Cat No.:R060203）is an organic compound with a cyclopentanone core substituted by a pentyl group at the 2-position and an ester-linked acetic acid moiety at the 1-position. With the molecular formula C13H22O3, it is typically a colorless to pale yellow liquid and valued for its use as a fragrance ingredient. The compound imparts a musky, fruity, or ambergris-like odor, making it useful in perfumes, cosmetics, and flavorings. Its ketone and ester functionalities also allow for further synthetic modification, contributing to its versatility in both fragrance formulation and organic synthesis.