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 6,6-dimethyl-2-(6-nitro-2,3-dihydro-1,4-benzoxazin-4-yl)-5,7-dihydro-[1,3]thiazolo[5,4-c]pyridin-4-one;ethane ?
user
C18H22N4O4S
assistant