You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[1-(7-bicyclo[4.2.0]octa-1,3,5,7-tetraenylmethyl)piperidin-4-yl]-N-methylbutanamide .
user
C19H26N2O
assistant