Dimercaprol59-52-9100 % similar 1,2-Butanedithiol16128-68-045 % similar 3-Mercaptopropane-1,2-diol96-27-545 % similar L-Dithiothreitol16096-97-233 % similar Dithiothreitol27565-41-933 % similar Dithiothreitol3483-12-333 % similar Dithioerythritol6892-68-833 % similar Unithiol4076-02-232 % similar 2-(Hydroxymethyl)-1,3-propanediol4704-94-332 % similar 1,2-Propanedithiol814-67-530 % similar