ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC1%28CCC2C1%28CCC3C2CCC4%3DCC%28%3DO%29CCC34C%29C%29O/file?format=sdf&get3d=True -- CCCC1%28CCC2C1%28CCC3C2CCC4%3DCC%28%3DO%29CCC34C%29C%29O could not be loaded.