ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H12O6/c1-21-15-7-14-10(5-13(15)19)9(6-16(20)22-14)8-2-3-11(17)12(18)4-8/h2-7,17-19H,1H3/file?format=sdf&get3d=True -- InChI=1S/C16H12O6/c1-21-15-7-14-10(5-13(15)19)9(6-16(20)22-14)8-2-3-11(17)12(18)4-8/h2-7,17-19H,1H3 could not be loaded.