You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-cyano-N-[(1S)-2-hydroxy-1-phenylethyl]anilino)-5-methyl-N-methylsulfonyl-1,3-thiazole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H20N4O4S2
assistant