You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R,3R,4S,5R,6R)-2-(3,4-dichlorophenyl)sulfanyl-6-(hydroxymethyl)-4-(4-methoxyanilino)oxane-3,5-diol .
user
C19H21Cl2NO5S
assistant