ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1C2CC%28C1%28C%29C%29CC2C3CCCC%28C3%29O/file?format=sdf&get3d=True  -- CC1C2CC%28C1%28C%29C%29CC2C3CCCC%28C3%29O could not be loaded.