You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-[(2,2-dimethyl-1-phenylcyclopropyl)methyl]-N-methyl-1-(3-pyrazin-2-yl-1,2,4-oxadiazol-5-yl)methanamine ?
user
C20H23N5O
assistant