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-[2-[(5-morpholin-4-ylpyridazin-3-yl)amino]ethyl]-2,1,3-benzothiadiazole-4-sulfonamide into molecular formula.
user
C16H19N7O3S2
assistant