You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)-2-[5-(4-propan-2-ylphenyl)tetrazol-2-yl]ethanone ?
user
C21H22N4O3
assistant