You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N'-[[(2R)-3-(3,4-dimethoxyphenyl)sulfonyl-1,3-oxazinan-2-yl]methyl]-N-(3-hydroxypropyl)oxamide into molecular formula.
user
C18H27N3O8S
assistant