ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H12O2/c1-5%282%293-4-6%287%298/h5H%2C3-4H2%2C1-2H3%2C%28H%2C7%2C8%29/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C6H12O2/c1-5%282%293-4-6%287%298/h5H%2C3-4H2%2C1-2H3%2C%28H%2C7%2C8%29 could not be loaded.