You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-chloro-5-(2-chlorophenyl)-2-[3-[4-(2-methoxyphenyl)piperazin-1-yl]propylsulfanyl]-3H-1,4-benzodiazepine is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H30Cl2N4OS
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