You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 4-[(4aS,5R,9bS)-2-ethyl-8-(125I)iodanyl-7-methyl-1,3,4,4a,5,9b-hexahydroindeno[1,2-c]pyridin-5-yl]benzoate .
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C23H26INO2
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