ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C2H4O2.Cu.2H3N/c2*1-2(3)4;;;/h2*1H3,(H,3,4);;2*1H3/q;;+2;;/p-2/file?format=sdf&get3d=True -- InChI=1S/2C2H4O2.Cu.2H3N/c2*1-2(3)4;;;/h2*1H3,(H,3,4);;2*1H3/q;;+2;;/p-2 could not be loaded.