You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R,3R)-2-(benzenesulfonyl)-1-(methoxymethyl)-3-(4-methoxyphenyl)cyclopropane-1-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19NO4S
assistant