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 furan-2-yl-[4-[1-[5-(4-nitrophenyl)-1,3,4-oxadiazol-2-yl]ethyl]piperazin-1-yl]methanone .
user
C19H19N5O5
assistant