You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(6-cyclohexyloxypyridazin-3-yl)piperazin-1-yl]-(2-methyl-3-nitrophenyl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H27N5O4
assistant