You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-1-methyl-3-(2-methylphenyl)urea into its molecular formula.
user
C19H20N4O3
assistant