You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl N-methyl-N-[3-(3-methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H15N5O2
assistant