You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-5-hydroxy-3-phenyl-1-[(2R)-3-(4-phenylphenyl)sulfonyl-1,3-thiazolidin-2-yl]pentan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27NO4S2
assistant