You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (6R)-4-(2-imidazol-1-ylethyl)-1,10-dimethyl-1,4,10-triazaspiro[5.6]dodecan-9-one by IUPAC nomenclature, provide its molecular formula.
user
C16H27N5O
assistant