ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H10O4/c9-4-8(12)5-1-2-6(10)7(11)3-5/h1-3,8-12H,4H2/file?format=sdf&get3d=True -- InChI=1S/C8H10O4/c9-4-8(12)5-1-2-6(10)7(11)3-5/h1-3,8-12H,4H2 could not be loaded.