ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H10O/c1-2-3-4-5-6-7/h2-5,7H,6H2,1H3/b3-2 ,5-4 /file?format=sdf&get3d=True  -- InChI=1S/C6H10O/c1-2-3-4-5-6-7/h2-5,7H,6H2,1H3/b3-2 ,5-4  could not be loaded.