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 (1S,3R,3aS,6aS)-5-(1,3-benzodioxol-5-ylmethyl)-1-[(1R)-1-hydroxyethyl]-6',7'-dimethylspiro[1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3,3'-1H-indole]-2',4,6-trione .
user
C25H25N3O6
assistant