ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H32/c1-14-8-11-20-13-15(14)12-16(20)6-7-17-18(2,3)9-5-10-19(17,20)4/h15-17H,1,5-13H2,2-4H3/t15-,16+,17+,19+,20+/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C20H32/c1-14-8-11-20-13-15(14)12-16(20)6-7-17-18(2,3)9-5-10-19(17,20)4/h15-17H,1,5-13H2,2-4H3/t15-,16+,17+,19+,20+/m1/s1 could not be loaded.