{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Spectroscopy and Structure Elucidation", "refinement": "This problem involves interpreting spectroscopic data (FTIR and NMR) to deduce the structure and chemical formula of an organic compound.", "specific_scope": "The task is to analyze the provided spectral data to identify the correct chemical formula from a list of candidates based on the presence of functional groups and the number of hydrogen signals observed in the NMR spectrum.", "goal": "Determine the correct chemical formula of the di-substituted aromatic compound based on the spectral data provided."}, "summary": "In this problem, we analyze the FTIR and 1H NMR spectra of a di-substituted aromatic compound to deduce its chemical formula. The FTIR indicates the presence of an ester group, while the 1H NMR shows six distinct signals corresponding to aromatic hydrogens, vinyl hydrogens, and methyl groups, with no signals for methylene groups. By considering the number of hydrogen atoms and the presence of functional groups, we can eliminate options and identify the correct chemical formula from the given candidates."}