You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(19S)-19-ethyl-25-fluoro-4-methoxy-13-[2-(4-methylsulfonylphenyl)acetyl]-2-oxa-9,13,18,21-tetrazatricyclo[21.2.2.13,7]octacosa-1(25),3,5,7(28),23,26-hexaene-8,17,20-trione is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H41FN4O8S
assistant