esters

FACTS
condensation product of an alcohol and an acid 

EXAMPLES
isoamyl acetate (banana)
ethyl acetate (apple) 

CAUSES
produced during yeast lipid synthesis
yeast strains differ in their production 
high pitch rate - low levels
high fermentation temperature - high levels
high aeration - low levels
high gravity - low levels
high pressure - low levels
high fatty acid content - low levels

EFFECTS
"fruit" flavors