3,7-Bis(carboethoxy)perhydro-1,5, 2,4,6,8,-dithiatetrazocine 1,1, 5, 5,-tetroxide AIDS-132640 AIDS132640 Diethyl 1,5,2,4,6,8-dithiatetraazocane-3,7-dicarboxylate 1,1,5,5-tetraoxide NSC627007