You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-methyl-6-oxo-N-[(1R)-1-thiophen-2-ylethyl]-4,5-dihydropyridazine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H15N3O2S
assistant