You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule tert-butyl N-[(1S,4R,6R,7Z,14S,18R)-4-[(1-methylcyclopropyl)sulfonylcarbamoyl]-18-[4-(2-morpholin-4-yl-1,3-thiazol-4-yl)-1-propan-2-ylbenzimidazol-2-yl]oxy-2,15-dioxo-16-azatricyclo[14.3.0.04,6]nonadec-7-en-14-yl]carbamate .
user
C45H61N7O9S2
assistant