{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Synthesis \u2192 Precursor Identification", "refinement": "This problem involves identifying the correct precursor compound needed for the synthesis of a specific target molecule.", "specific_scope": "The target molecule is methyl 2-propyl-1,2,4a,5,6,7,8,8a-octahydronaphthalene-1-carboxylate, and the candidates are various methyl tetradecatrienoates with different stereochemical configurations.", "goal": "Select the appropriate precursor from the given candidates that can be transformed into the target molecule through a series of chemical reactions."}, "summary": "This problem is centered on organic chemistry, specifically the identification of a precursor compound necessary for synthesizing a complex target molecule. The target is methyl 2-propyl-1,2,4a,5,6,7,8,8a-octahydronaphthalene-1-carboxylate, and the candidates provided are different stereoisomers of methyl tetradecatrienoate. The goal is to determine which of these candidates can effectively serve as a precursor for the desired synthesis, with the correct answer being methyl (2E,8E,10E)-tetradeca-2,8,10-trienoate."}