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 (E)-3-[4-chloro-2-[(5-methyltetrazol-2-yl)methyl]phenyl]-1-[(2R)-2-(5-methyl-1,2,4-oxadiazol-3-yl)piperidin-1-yl]prop-2-en-1-one .
user
C20H22ClN7O2
assistant