You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[3-[[4-[3-[3,5-dimethyl-1-(3-methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)pyrazol-4-yl]propanoyl]piperazin-1-yl]methyl]phenyl]methanesulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C26H33N9O3S
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