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,4S,4aS,6R,8aR)-4-hydroxy-2,3,3a,4,4a,5,6,7,8,8a-decahydro-1H-pyrrolo[1,2-a]indole-6-carboxylic acid .
user
C12H19NO3
assistant