You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-carbamoyl-6-[2-[2-(4-hydroxyphenyl)ethylamino]pyridin-4-yl]pyridin-2-yl]piperazine-1-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26N6O4
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