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)-1-[2-chloro-4-[3-chloro-4-[(2R)-3-chloro-2-hydroxypropoxy]phenyl]sulfonylphenoxy]-3-methoxypropan-2-ol .
user
C19H21Cl3O7S
assistant