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 5-[(3aS,4S,6aR)-2,5-dioxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-[3-(4-hydroxy-3-(125I)iodanylphenyl)propanoylamino]ethyl]pentanamide .
user
C21H29IN4O5S
assistant