You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5S)-2-[(2R)-2-[2-chloro-4-(3-chlorophenyl)sulfanylphenyl]propyl]-3,5-diethoxy-2-methyl-5-propan-2-ylpyrazine into its molecular formula.
user
C27H34Cl2N2O2S
assistant