You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dichloro-6-[(E)-[[5-(2-methoxyphenyl)-1,2,4-triazin-3-yl]hydrazinylidene]methyl]phenol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H13Cl2N5O2
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