You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1E)-3-N-(methylaminomethyl)-1-(methylideneamino)-2-methylsulfanyl-1-N-(3-propylcyclopentyl)buta-1,3-diene-1,3-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H30N4S
assistant