ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H6O4/c7-4-2-1-3-5(8)6(9)10/h1-4,8H,(H,9,10)/b2-1 ,5-3-/file?format=sdf&get3d=True  -- InChI=1S/C6H6O4/c7-4-2-1-3-5(8)6(9)10/h1-4,8H,(H,9,10)/b2-1 ,5-3- could not be loaded.