You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[5-(7-ethyl-1,3-dimethyl-2,6-dioxopurin-8-yl)sulfanyl-1,3,4-thiadiazol-2-yl]acetamide into molecular formula.
user
C13H15N7O3S2
assistant