You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E,2R,3R,4R,5R)-3,4-dihydroxy-2,5-dimethoxy-8,8-dimethyl-N-[(3S)-2-oxoazepan-3-yl]non-6-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H34N2O6
assistant