ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C6H6O4/c7-2-4-1-5(8)6(9)3-10-4/h1,3,7,9H,2H2/file?format=sdf&get3d=True -- InChI=1/C6H6O4/c7-2-4-1-5(8)6(9)3-10-4/h1,3,7,9H,2H2 could not be loaded.