The triene shown is subjected to ozonolysis with reductive work-up. How many distinct carbonyl compounds are formed (count compounds, not molecules; all three double bonds are cleaved)? Give the answer as an integer.

Numerical answer type, tolerance 0.5.

Answer: 4

The compound shown is 2-methylnona-2,4,7-triene. Its three double bonds give ethanal, propanedial (

OHC - CH X_{2} - CHO

), ethanedial (

OHC - CHO

) and propanone. All four are different compounds, so the count is 4.