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 3-[2-(4-benzhydrylpiperazin-1-yl)-2-oxoethyl]-6-chloro-7-hydroxy-4-methylchromen-2-one .
user
C29H27ClN2O4
assistant