ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H11NO4/c1-3(7)6(10)11-4(2)5(8)9/h3-4H,7H2,1-2H3,(H,8,9)/t3-,4-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C6H11NO4/c1-3(7)6(10)11-4(2)5(8)9/h3-4H,7H2,1-2H3,(H,8,9)/t3-,4-/m1/s1 could not be loaded.