{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Spectroscopy", "refinement": "This problem involves interpreting NMR spectroscopy data to deduce structural information about organic compounds.", "specific_scope": "The focus is on analyzing the 1H and 13C NMR spectra of a dicarboxylic acid-derived anhydride and its reaction products with a specific diene.", "goal": "Identify the specific resonances in the major product's 2D NOESY NMR spectrum that are connected by a cross-peak, indicating spatial proximity."}, "summary": "This problem requires understanding NMR spectroscopy, particularly 1H and 2D NOESY techniques, to analyze the structure of organic compounds. The major product from the reaction of an anhydride with a diene shows a cross-peak in its NOESY spectrum, indicating that two protons are spatially close to each other. The task is to identify which two specific resonances are connected by this cross-peak, with the correct answer being a 1H doublet at 1.2 ppm and a 2H singlet at 3.8 ppm."}