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 [4-[(Z)-1-(4-chlorophenyl)-4-hydroxybut-1-en-2-yl]sulfonylpiperazin-1-yl]-(4-pyridin-2-ylphenyl)methanone .
user
C26H26ClN3O4S
assistant