You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-N-(2-aminoethyl)-1-N",1-N"-dicyclopropyl-1-N',1-N'-dimethylethane-1,1,1,2-tetramine is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H27N5
assistant