ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2ClH.Hg/h2*1H;/q;;+2/p-2/file?format=sdf&get3d=True -- InChI=1S/2ClH.Hg/h2*1H;/q;;+2/p-2 could not be loaded.