You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-cyclopropyl-1-methyl-5-methylidene-4-[5-(4-methylthiophen-2-yl)thiophen-2-yl]imidazol-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H19N3S2
assistant