You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3R,6aR,8S,10aR)-1-(3-chlorophenyl)sulfonyl-3-hydroxy-3,4,6,6a,8,9,10,10a-octahydro-2H-pyrano[2,3-c][1,5]oxazocin-8-yl]-N-phenylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H27ClN2O6S
assistant