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 1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-3-(2-phenylethyl)-4-sulfanylidenepyrimidin-2-one .
user
C17H20N2O5S
assistant