You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-(5-chloro-6-propan-2-yloxypyridin-3-yl)-3-(3,5-dimethyl-4-prop-2-enoxyphenyl)-1,2,4-oxadiazole into molecular formula.
user
C21H22ClN3O3
assistant