ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H28O4/c1-13-11-15-16-18(2,17(21)24-15)7-4-8-19(16,3)20(13,22)9-5-14-6-10-23-12-14/h6,10,12-13,15-16,22H,4-5,7-9,11H2,1-3H3/t13-,15-,16+,18+,19+,20-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C20H28O4/c1-13-11-15-16-18(2,17(21)24-15)7-4-8-19(16,3)20(13,22)9-5-14-6-10-23-12-14/h6,10,12-13,15-16,22H,4-5,7-9,11H2,1-3H3/t13-,15-,16+,18+,19+,20-/m1/s1 could not be loaded.