Draw an example of a γ-keto aldehyde.

Structure of a gamma-keto aldehyde with one aldehyde and one ketone functional group.

Another example of a gamma-keto aldehyde with a similar structure to the first image.

A gamma-keto aldehyde structure featuring two ketone groups and one aldehyde group.

Structure of a gamma-keto aldehyde with two ketone groups and one aldehyde group, similar to the previous image.