The IUPAC name for the following compound is:

Based on IUPAC nomenclature rules:

• Principal Functional Group: The carboxylic acid (-COOH) takes priority over the aldehyde (-CHO), making the parent structure an alkenoic acid.
• Main Chain: The longest carbon chain containing both the acid and the aldehyde group has 6 carbons (hex-).
• Numbering: Carbon 1 is the carboxylic acid carbon. The double bond starts at carbon 3.
• Substituents:
  • Methyl groups $$CH_3$$: Located at positions 2 and 5.
  • Oxo group: The aldehyde carbon at position 6 is treated as a substituent called "oxo" because it is part of the main chain.

Full IUPAC Name:2,5-dimethyl-6-oxo-hex-3-enoic acid