You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1S,2S,8S,11R,16S)-18-(4-imidazol-1-ylbenzoyl)-11-methyl-8-propan-2-yl-7,14,18-triazatricyclo[14.3.1.02,14]icosane-6,13-dione into molecular formula.
user
C31H43N5O3
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