Linked from

The 2 pages that link to Glycolaldehyde, each with the reason it gives.

• GlyoxalCompared with: Reduction of one glyoxal aldehyde group produces glycolaldehyde, changing a dialdehyde into a hydroxyaldehyde.

• Glyoxylic acidCompared with: It shares glyoxylic acid’s two-carbon aldehyde framework but lacks a carboxyl group.