ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H16/c1-3-9-17(10-4-1)19-13-7-8-14-20(16-15-19)18-11-5-2-6-12-18/h1-16H/b8-7?,13-7-,14-8-,16-15?,19-13?,19-15+,20-14?,20-16+/file?format=sdf&get3d=True  -- InChI=1S/C20H16/c1-3-9-17(10-4-1)19-13-7-8-14-20(16-15-19)18-11-5-2-6-12-18/h1-16H/b8-7?,13-7-,14-8-,16-15?,19-13?,19-15+,20-14?,20-16+ could not be loaded.