ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2Cu.Hg.4HI/h;;;4*1H/q2*+1;+2;;;;/p-4/file?format=sdf&get3d=True  -- InChI=1S/2Cu.Hg.4HI/h;;;4*1H/q2*+1;+2;;;;/p-4 could not be loaded.