You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
dimethylsilylidenezirconium(2+);2-methyl-4-phenyl-1,4-dihydroazulen-1-ide;4-phenyl-2-propan-2-yl-1,4-dihydroazulen-1-ide;dichloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C38H40Cl2SiZr-2
assistant