You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,4R,5S)-5-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-2-azido-4-fluoro-2-(hydroxymethyl)oxolan-3-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C11H12FN7O3
assistant