You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[2-(1-benzofuran-5-ylamino)-[1,2,4]triazolo[1,5-a]pyridin-6-yl]-4-chlorophenol into its molecular formula.
user
C20H13ClN4O2
assistant