You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[4-[3-[(1-ethyl-2H-thieno[3,2-c]pyrazol-1-ium-5-yl)methyl]triazolo[4,5-b]pyrazin-5-yl]pyrazol-1-yl]ethanol into molecular formula.
user
C17H18N9OS+
assistant