You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[2-(dimethylamino)ethyl]-2-ethyl-N-methyl-3-[methyl(3-methylbutyl)amino]imidazo[1,2-a]pyridine-6-carboxamide .
user
C21H35N5O
assistant