{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves the identification of a final product from a series of chemical reactions based on the starting compound's molecular formula and NMR data.", "specific_scope": "The focus is on the transformation of a compound with the molecular formula C8H9NO through a series of reactions involving diazotization, hydrolysis, and subsequent reactions with KOH under heat.", "goal": "Determine the final product of the reactions based on the provided NMR data and the structure of the starting compound."}, "summary": "This problem requires understanding organic chemistry reactions and interpreting NMR data to identify the final product after a series of transformations. The starting compound with the molecular formula C8H9NO undergoes diazotization, hydrolysis, and a reaction with KOH, leading to the formation of a specific compound. The NMR data provides crucial information about the structure of the final product, which is identified as 2,4-bis(4-hydroxyphenyl)but-2-enal."}