You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3R,7aS)-3-tert-butyl-1-hydroxy-7a-methyl-1,3,6,7-tetrahydropyrrolo[1,2-c][1,3]oxazol-5-one into molecular formula.
user
C11H19NO3
assistant