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,5R,6S,7S,7aR)-2-butylimino-5-(2-hydroxyethyl)-3,3a,5,6,7,7a-hexahydropyrano[2,3-d][1,3]oxazole-6,7-diol .
user
C12H22N2O5
assistant