You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[(3-methylsulfonylpyridin-2-yl)amino]-6-[(5-morpholin-4-ylpyridin-2-yl)amino]-N-(trideuteriomethyl)pyridazine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H24N8O4S
assistant