You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (3aS,4S,6aR)-4-(8-methyl-5-oxononyl)-5-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-2-one ?
user
C15H26N2O3S
assistant