You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by tert-butyl 4-[[2-[5-(1,3-benzothiazol-2-yl)-4-oxo-3-oxa-13-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1(17),2(7),5,8-tetraen-6-yl]benzoyl]-propylamino]butanoate;sulfur trioxide ?
user
C40H43N3O8S2
assistant