You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,6S)-2-methyl-6-phenylmorpholin-4-yl]-[(4S)-1,3-thiazolidin-4-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H20N2O2S
assistant