You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-methyl-N-[3-(5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)phenyl]-4-(tetrazol-1-yl)benzamide into its molecular formula.
user
C22H21N7O
assistant