ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C4H4N2O2/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8)/f/h5-6H (1,3H-Uracile)/file?format=sdf&get3d=True  -- InChI=1/C4H4N2O2/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8)/f/h5-6H (1,3H-Uracile) could not be loaded.