You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 5-chloro-N-(1-propan-2-ylpyrazolo[3,4-b]pyridin-5-yl)-2,3-dihydro-1-benzofuran-2-carboxamide is given. What is its corresponding molecular formula?
user
C18H17ClN4O2
assistant