You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2,3,3a,3b,4,5,5a,6,7,8,9,9b,10,11-tetradecahydro-1H-naphtho[2,1-e]indazole-9a,11a-diamine .
user
C15H28N4
assistant