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 propan-2-yl (2S)-2-[[(3S)-5-(5-amino-3-oxo-1,2,4-triazin-2-yl)-4-(2-chloroethynyl)-4-fluoro-3-hydroxyoxolan-2-yl]methoxy-phenoxyphosphoryl]oxypropanoate .
user
C22H25ClFN4O9P
assistant