You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-butan-2-yl-2-(4,5-dimethoxy-10-oxo-14-thia-8,11,16-triazatetracyclo[7.7.0.02,7.011,15]hexadeca-1(9),2,4,6,15-pentaen-8-yl)acetamide into its molecular formula.
user
C20H24N4O4S
assistant