You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(5-but-3-yn-2-yloxy-2,4-difluorophenyl)-1-chloro-5,6,7,8-tetrahydropyrazolo[1,2-a]pyridazin-3-one;1-chloro-2-(2,4-difluoro-5-hydroxyphenyl)-5,6,7,8-tetrahydropyrazolo[1,2-a]pyridazin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H26Cl2F4N4O4
assistant