You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1,3-benzodioxol-5-ylmethyl)-2-[[8-(2-methylpropyl)-7-oxo-5-thia-1,8,10,11-tetrazatricyclo[7.3.0.02,6]dodeca-2(6),3,11-trien-12-yl]sulfanyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N5O4S2
assistant