You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(1-bromobutyl)-3-[[7-bromo-6-[2-(2-trityltetrazol-5-yl)phenyl]cyclopenta[c]pyran-5-yl]methyl]-5-chloroimidazole-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C43H33Br2ClN6O3
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