ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C3H6O3.Cu/c2*1-2(4)3(5)6;/h2*2,4H,1H3,(H,5,6);/q;;+2/p-2/file?format=sdf&get3d=True -- InChI=1S/2C3H6O3.Cu/c2*1-2(4)3(5)6;/h2*2,4H,1H3,(H,5,6);/q;;+2/p-2 could not be loaded.