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 N-[(2R)-2-fluoro-3-hydroxy-3-methylbutyl]-8-(propan-2-ylamino)-2-pyridin-3-ylimidazo[1,2-b]pyridazine-7-carboxamide .
user
C20H25FN6O2
assistant