ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H21N3O7/c1-4-27-16(23)18(20-11(3)22,17(24)28-5-2)9-12-10-19-15-7-6-13(21(25)26)8-14(12)15/h6-8,10,19H,4-5,9H2,1-3H3,(H,20,22)/file?format=sdf&get3d=True  -- InChI=1S/C18H21N3O7/c1-4-27-16(23)18(20-11(3)22,17(24)28-5-2)9-12-10-19-15-7-6-13(21(25)26)8-14(12)15/h6-8,10,19H,4-5,9H2,1-3H3,(H,20,22) could not be loaded.