You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-3-deuterio-3-(4-hydroxyphenyl)-2-[[(3S,4R,5R)-3,4,5,6-tetrahydroxy-2-oxohexyl]amino]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H21NO8
assistant