You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (E,2R,5R)-6-(1,3-dithian-2-yl)-2-methyl-5-phenylmethoxyhex-3-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H28O3S2
assistant