ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C4H8O2.Cu/c2*1-2-3-4(5)6;/h2*2-3H2,1H3,(H,5,6);/q;;+2/p-2/file?format=sdf&get3d=True -- InChI=1S/2C4H8O2.Cu/c2*1-2-3-4(5)6;/h2*2-3H2,1H3,(H,5,6);/q;;+2/p-2 could not be loaded.