You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-chloro-1-hydroxy-4-naphthalen-2-yl-1-oxido-3H-thieno[2,3-c]thiazin-1-ium-4-ol into its molecular formula.
user
C16H12ClNO3S2
assistant