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 N'-[4-(4a,5,6,7-tetrahydro-4H-cyclopenta[d]pyrimidin-4-yl)butyl]-N'-propyl-N-(5,6,7,8-tetrahydronaphthalen-1-yl)ethane-1,2-diamine .
user
C26H40N4
assistant