You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-amino-4-methyl-9,10-dioxo-1,2,3,4,4a,5,6,7,8,8a,9a,10a-dodecahydroanthracene-2-sulfonic acid into its molecular formula.
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C15H23NO5S
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