ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/3C2H4O2.Na.2O.U/c3*1-2(3)4;;;;/h3*1H3,(H,3,4);;;;/q;;;+1;;;+2/p-3/file?format=sdf&get3d=True -- InChI=1S/3C2H4O2.Na.2O.U/c3*1-2(3)4;;;;/h3*1H3,(H,3,4);;;;/q;;;+1;;;+2/p-3 could not be loaded.