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,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-hydroxy-2-(2-methylpropanoyloxymethyl)thiolan-3-yl] (2R)-2-amino-3-methylbutanoate ?
user
C18H27N3O7S
assistant