You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3aR,4R,5S,6S,6aS)-4-(hydroxymethyl)-2-[2-[(2R,3R,4R,5S)-3,4,5-trihydroxy-2-(hydroxymethyl)piperidin-1-yl]ethylimino]-3a,5,6,6a-tetrahydro-3H-cyclopenta[d][1,3]oxazole-4,5,6-triol .
user
C15H27N3O9
assistant