ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H12O2/c1-5%282%294-8-6%283%297/h5H%2C4H2%2C1-3H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H12O2/c1-5%282%294-8-6%283%297/h5H%2C4H2%2C1-3H3 could not be loaded.