ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C12H12O4/c1-8(13)6-10(14)4-2-9-3-5-11(15)12(16)7-9/h2-5,7,15-16H,6H2,1H3/file?format=sdf&get3d=True -- InChI=1S/C12H12O4/c1-8(13)6-10(14)4-2-9-3-5-11(15)12(16)7-9/h2-5,7,15-16H,6H2,1H3 could not be loaded.