ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H13N/c1-7-5-3-2-4-6-7/h2-6H2,1H3/file?format=sdf&get3d=True  -- InChI=1S/C6H13N/c1-7-5-3-2-4-6-7/h2-6H2,1H3 could not be loaded.