You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-amino-4,5-bis(2-methoxyethoxy)benzonitrile;3-ethynylaniline;N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)quinazolin-4-amine;dihydrochloride by IUPAC nomenclature, provide its molecular formula.
user
C43H50Cl2N6O8
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