You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [(4aS,6R,11bR)-3,3,6,11b-tetramethyl-10-nitro-4,4-dioxo-5,6-dihydro-4aH-[1]benzoxepino[4,5-b][1,4]thiazin-2-yl]carbamic acid ?
user
C17H21N3O7S
assistant