You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethyl-N-(furan-2-ylmethyl)-6-methylimidazo[2,1-b][1,3,4]thiadiazole-5-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H14N4O3S2
assistant