You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(4-methoxyphenyl)-1,3-thiazol-4-yl]methyl (E)-3-(1,3-benzothiazol-2-yl)prop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H16N2O3S2
assistant