You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3-benzyl-2-benzylsulfonylimidazol-4-yl)methyl]-1-(2-methylpropyl)-3-propan-2-ylthiourea is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H34N4O2S2
assistant