ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCN2c3c%28cccn3%29Cc4ccccc4%5BC%40H%5D2C1/file?format=sdf&get3d=True  -- CN1CCN2c3c%28cccn3%29Cc4ccccc4%5BC%40H%5D2C1 could not be loaded.