You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,5R)-5-[4-(hydroxyamino)-5-(2-trimethylsilylethynyl)pyrrolo[2,3-d]pyrimidin-7-yl]-2-(hydroxymethyl)-4-methoxy-4-methyloxolan-3-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H26N4O5Si
assistant