1,8-Dimethoxyoctane-1,8-diyldiammonium dichloride 34490-86-3 Dimethyl suberimidate dihydrochloride EINECS 252-060-4 NSC 163476 Octanediimidic acid, dimethyl ester, dihydrochloride Suberimidic acid, dimethyl ester, dihydrochloride