You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[6-[2-(4-chlorophenyl)ethyl]pyridin-2-yl]-8-(4-methylpiperazin-1-yl)imidazo[1,2-a]pyrazine;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26Cl2N6
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