"Roy" > wrote in message =
oups.com...

> more than 20 ketones were identified in the bread aroma.
> 2- propanone( acetone)
> 2- butanone( methylethylketone)
> 3- hydroxy butanone( acetoin)
> 2.3 butanedione( diacetyl)
> 2- pentanone
> 3- pentene-2-one
> 4- methylpentene-2-one
> 2-cylclopentene 1-one
> 2- hexanone
> 3-hexanone
> 2- heptanone
> 2-octanone
> Trimethylpenadecanone
> 2-heptadecanone
> Dihydro2- methylfuranone
> Dimethylfuranone
> 2- acetylfuran
> 1- furyl- propanone
> 1-furyl-2-propanedione
> 3-hydroxy-2-methyl-4-pyrone
> 2-methyl-3-oxalone

To be perfectly honest, Roy, I have never noticed any
dihydro2- methylfuranone nor drimethylpenadecanone.

--
Dicky