You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(5-methyl-1,2-oxazol-3-yl)-2-[1-(2-propan-2-ylphenyl)imidazol-2-yl]sulfanylbutanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H24N4O2S
assistant