You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R)-2-[(5R,6S,7R,7aS)-6,7-dihydroxy-2,3,5,6,7,7a-hexahydropyrrolo[2,1-b][1,3]thiazol-5-yl]-2-hydroxyacetic acid .
user
C8H13NO5S
assistant