ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOCCn1c%28nc2ccccc12%29C3CCN%28CCc4ccc%28cc4%29C%28C%29%28C%29C%28%3DO%29O%29CC3/file?format=sdf&get3d=True  -- CCOCCn1c%28nc2ccccc12%29C3CCN%28CCc4ccc%28cc4%29C%28C%29%28C%29C%28%3DO%29O%29CC3 could not be loaded.