You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,4,8,9-tetrahydro-1H-[1,4]oxazino[4,3-a]benzimidazol-8-ylmethyl N-(2,4-dimethyl-1,3-thiazol-5-yl)carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H20N4O3S
assistant