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 (2S)-2-methyl-1-[2-[(2R)-2-methyl-3-phenyl-2H-benzimidazol-1-yl]ethyl]-3-phenyl-2H-benzimidazole ?
user
C30H30N4
assistant