You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (1R,3'R,4'S,5'S,6'R)-8-[(4-ethylphenyl)methyl]-6'-(hydroxymethyl)spiro[3,4-dihydro-[1]benzothiolo[2,3-c]pyran-1,2'-oxane]-3',4',5'-triol;(1R,3'R,4'S,5'R,6'R)-8-[(4-ethylphenyl)methyl]-3',4',5'-tris(phenylmethoxy)-6'-(phenylmethoxymethyl)spiro[3,4-dihydro-[1]benzothiolo[2,3-c]pyran-1,2'-oxane] .
user
C78H80O12S2
assistant