ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H13NO/c1-6(2,3)4-5(7)8/h4H2,1-3H3,(H2,7,8)/file?format=sdf&get3d=True -- InChI=1S/C6H13NO/c1-6(2,3)4-5(7)8/h4H2,1-3H3,(H2,7,8) could not be loaded.