| abstract |
The invention provides a compound of formula (I), wherein R<1> and R<2> are independently selected from hydrogen, methyl, ethyl, propyl and isopropyl; or R and R together form a saturated or monounsaturated 5- or 6-membered hydrocarbon ring, as represented by the arcuate dotted line; R<3> is selected from methyl and ethyl; R<4> is selected from methyl, ethyl, propyl, isopropyl, cyclopropyl, butyl, isobutyl, cyclobutyl and cyclopentyl; R<5> is selected from hydrogen and methyl, and the dotted line between positions 3" and 4" represents an optional double bond. The compounds have a musk odour and are useful in fine and functional fragrances. |