Macrocyclic lactone compounds (Q) are new. Macrocyclic lactone compounds (Q) of formulae (I) and/or (II) are new. line with dotted line : an additional double bond in the 11th- or 12th-position, which is in cis or trans configuration; and n : 0 or 1. Independent claims are included for: (1) the preparation of (Q); and (2) a fragrance composition comprising (I) together with at least one further fragrant. [Image].
