You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-N,1-N,3-N,3-N-tetracyclohexyl-1,2,3,3a,4,5,5a,6,7,8,8a,9,10,10a,10b,10c-hexadecahydropyrene-1,3-diamine into molecular formula.
user
C40H68N2
assistant