3-thiophenecarboxylic acid, 5,5'-dithiobis[2-amino-4-(2-methylpropyl)-, diethyl ester InChI=1/C22H32N2O4S4/c1-7-27-19(25)15-13(9-11(3)4)21(29-17(15)23)31-32-22-14(10-12(5)6)16(18(24)30-22)20(26)28-8-2/h11-12H,7-10,23-24H2,1-6H diethyl 5,5'-dithiobis(2-amino-4-isobutylthiophene-3-carboxylate)