You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[[4-[10-chloro-6-(5-cyclopropylthiophen-2-yl)-1-fluoro-6H-indolo[1,2-c][1,3]benzoxazin-3-yl]-2,3-dihydro-1H-imidazol-2-yl]methyl]-N-ethylcarbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H34ClFN4O3S
assistant