You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethyl-N-[(4-methoxyphenyl)methyl]-3-[(4-methoxyphenyl)methyl-methylamino]imidazo[1,2-a]pyridine-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H30N4O3
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