ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H16O4/c17-13-6-5-12(14(18)9-13)3-1-2-11-4-7-15-16(8-11)20-10-19-15/h4-9,17-18H,1-3,10H2/file?format=sdf&get3d=True  -- InChI=1S/C16H16O4/c17-13-6-5-12(14(18)9-13)3-1-2-11-4-7-15-16(8-11)20-10-19-15/h4-9,17-18H,1-3,10H2 could not be loaded.