Synergistic perfuming composition

A perfuming composition comprising:

• a) at least one β-thio carbonyl profragrance derivative of formula
• PS—R (I)
• wherein the wavy line indicates the location of the bond between said P and the sulfur atom;
• P represents a group of the formulae (P-1) to (P-9), in the form of any one of their isomers:
• in which formulae the wavy lines have the meaning indicated above and the dotted lines represent a single or double bond, and R9 being a hydrogen atom or a methyl group;
• and
• R represents a linear or branched alkyl group having from 8 to 15 carbon atoms, optionally comprising a carboxylic functional group which is not directly linked to the sulphur atom;
• and
• b) at least one perfume ingredient selected among:
• acyclic mono-terpenes derivatives;
• and/or
• musk compounds;
• said components a) and b) being present in a w/w (weight to weight) ratio a)/b) comprised between 1/1 and 1/4500;
• wherein fragrance intensities of top notes and bottom notes of the at least one perfume ingredient are enhanced by the presence of the at least one β-thio carbonyl profragrance derivative.