You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl 5-methoxy-3-(2'-oxo-1'-pentylspiro[6H-furo[2,3-f][1,3]benzodioxole-7,3'-indole]-4'-yl)indole-1-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C35H36N2O7
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