ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8H6O4.K/c9-7%2810%295-3-1-2-4-6%285%298%2811%2912/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C8H6O4.K/c9-7%2810%295-3-1-2-4-6%285%298%2811%2912 could not be loaded.