A new compound derivative that can be used to form a unit molecular film as a rectifier in a molecular electronic device, a new rectifying compound (4,5,9,10-tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester and its derivative (4,5,9,10-Tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester, and methods of synthesizing the compounds are provided.