You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl N-[(2S)-1-[[6-[(2R)-2-(3-fluorophenyl)pyrrolidin-1-yl]imidazo[1,2-b]pyridazine-3-carbonyl]amino]propan-2-yl]carbamate .
user
C22H25FN6O3
assistant