You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(3R,4S,6R)-3,5-diacetyloxy-4-azido-6-(3-chloro-4-cyanophenyl)sulfanyloxan-2-yl]methyl acetate into molecular formula.
user
C19H19ClN4O7S
assistant