You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name [2-[[(1R)-1-(1,3-benzothiazol-2-yl)ethyl]-methylamino]-2-oxoethyl] 3,4-dimethoxybenzoate ?
user
C21H22N2O5S
assistant