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 (3R)-3-methyl-N-(2-methylpropyl)-1,1-dioxo-3,4-dihydro-2H-5,1lambda6,2-benzoxathiazepin-9-amine ?
user
C13H20N2O3S
assistant