You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 9-[2-[4-(1,3-benzothiazol-2-ylsulfonyl)-3-oxo-1,2,4-triazinan-1-yl]-2-oxoethyl]-1H-purin-6-one ?
user
C17H14N8O5S2
assistant