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 (3aR)-8-methyl-7-[3-(2-thiophen-2-ylbenzimidazol-1-yl)propoxy]-2,3,3a,10a-tetrahydro-1H-cyclopenta[c][1]benzazepin-10-one ?
user
C28H27N3O2S
assistant