You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3',3'-dimethylspiro[benzo[f]chromene-3,2'-indole]-1'-yl)methyl 3-(3',3'-dimethylspiro[benzo[f][1,4]benzoxazine-3,2'-indole]-1'-yl)propanoate into its molecular formula.
user
C47H41N3O4
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