You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [(2R,3R,4R,5R)-5-(6-benzamidopurin-9-yl)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-[tert-butyl(dimethyl)silyl]oxyoxolan-3-yl] methyl phosphite ?
user
C45H51N5O9PSi-
assistant