You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [acetyl-[(Z,2R)-2-methylhept-4-enoyl]amino] (2S,5R)-6-butoxy-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C21H33N3O6
assistant