You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-(1-ethylpiperidin-4-yl)-2-(5-hydroxy-2-methyl-1,3-benzoxazol-6-yl)pyrido[2,3-d]pyridazin-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23N5O3
assistant