ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C2H4O2.2O.U.Zn/c2*1-2(3)4;;;;/h2*1H3,(H,3,4);;;;/q;;;;; 2/p-2/file?format=sdf&get3d=True -- InChI=1S/2C2H4O2.2O.U.Zn/c2*1-2(3)4;;;;/h2*1H3,(H,3,4);;;;/q;;;;; 2/p-2 could not be loaded.