You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1,1-dioxothiolan-3-yl)-2-[(3-methoxyphenyl)methyl-methylamino]-N-(oxolan-2-ylmethyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H30N2O5S
assistant