You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (E)-N-[5-[(1,3-dioxoisoindol-2-yl)methyl]-1,3,4-thiadiazol-2-yl]but-2-enamide ?
user
C15H12N4O3S
assistant