ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C21H42O4/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-21%2824%2925-19-20%2823%2918-22/h20%2C22-23H%2C2-19H2%2C1H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C21H42O4/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-21%2824%2925-19-20%2823%2918-22/h20%2C22-23H%2C2-19H2%2C1H3 could not be loaded.