ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H20N2O2/c1-4-10-17-15-9-7-12-6-8-13(11-14(12)15)20-16(19)18(3)5-2/h1,6,8,11,15,17H,5,7,9-10H2,2-3H3/t15-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C16H20N2O2/c1-4-10-17-15-9-7-12-6-8-13(11-14(12)15)20-16(19)18(3)5-2/h1,6,8,11,15,17H,5,7,9-10H2,2-3H3/t15-/m1/s1 could not be loaded.