ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C5H11N2O2.ClH.Hg/c1-4(9-2)3-7-5(6)8;;/h4H,1,3H2,2H3,(H3,6,7,8);1H;/q;;+1/p-1/i;;1-4/file?format=sdf&get3d=True  -- InChI=1S/C5H11N2O2.ClH.Hg/c1-4(9-2)3-7-5(6)8;;/h4H,1,3H2,2H3,(H3,6,7,8);1H;/q;;+1/p-1/i;;1-4 could not be loaded.