You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 3a,6-dimethyl-2,3,4,5,10,10a-hexahydro-1H-cyclopenta[b][1,5]benzodiazepine using the IUPAC nomenclature.
user
C14H20N2
assistant