You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-[1-[(2R,4S,5R)-4-[[(1S,3R,3aS)-3-methyl-3-phenyl-3a,4,5,6-tetrahydropyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]oxy]-3-(2-cyanoethoxymethoxy)-5-ethyloxolan-2-yl]-2-oxopyrimidin-4-yl]acetamide ?
user
C28H36N5O7P
assistant