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/h2-7,14-16H,1H3/b4-2 ,10-6-/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/h2-7,14-16H,1H3/b4-2 ,10-6- could not be loaded.