ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C7H6O6/c8-5(9)2-1-4(7(12)13)3-6(10)11/h1-3H,(H,8,9)(H,10,11)(H,12,13)/b2-1-,4-3+/file?format=sdf&get3d=True  -- InChI=1S/C7H6O6/c8-5(9)2-1-4(7(12)13)3-6(10)11/h1-3H,(H,8,9)(H,10,11)(H,12,13)/b2-1-,4-3+ could not be loaded.