You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-ethyl-2,5-dimethyl-N-propyl-7-(2,4,6-trimethylphenyl)imidazo[1,5-b]pyridazin-4-amine into its molecular formula.
user
C22H30N4
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