You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-hydroxy-N-(7-morpholin-4-ylpyrazolo[1,5-a]pyrimidin-5-yl)naphthalene-2-carboxamide is given. What is its corresponding molecular formula?
user
C21H19N5O3
assistant