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 N-(6-bromo-2,3,4,9-tetrahydro-1H-fluoren-1-yl)benzamide;tert-butyl N-(7-methyl-2,3,4,9-tetrahydro-1H-fluoren-1-yl)carbamate .
user
C39H43BrN2O3
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