ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H18O2/c1-15(17,13-9-5-3-6-10-13)16(2,18)14-11-7-4-8-12-14/h3-12,17-18H,1-2H3/file?format=sdf&get3d=True  -- InChI=1S/C16H18O2/c1-15(17,13-9-5-3-6-10-13)16(2,18)14-11-7-4-8-12-14/h3-12,17-18H,1-2H3 could not be loaded.