ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1c%28CCCC2CCCN3CCN%28C4CCCCC4%29CC3%29c2ccc1/file?format=sdf&get3d=True  -- COc1c%28CCCC2CCCN3CCN%28C4CCCCC4%29CC3%29c2ccc1 could not be loaded.