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 5-hydroxy-2-(3-methylbutyl)-4-(7-methylsulfonyl-1,1-dioxo-4H-1lambda6,2,4-benzothiadiazin-3-yl)-6-thiophen-2-ylpyridazin-3-one .
user
C21H22N4O6S3
assistant