You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(cyclopropylmethylsulfonyl)-3-(oxolan-2-ylmethyl)imidazol-4-yl]-N-[(1,3-dimethylpyrazol-4-yl)methyl]-N-methylmethanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H31N5O3S
assistant