ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BNi%2B2%5D1%5BCl-%5D%5BNi%2B2%5D%5BCl-%5D1.NCCN.NCCN.NCCN.NCCN.%5BCl-%5D.%5BCl-%5D/file?format=sdf&get3d=True  -- %5BNi%2B2%5D1%5BCl-%5D%5BNi%2B2%5D%5BCl-%5D1.NCCN.NCCN.NCCN.NCCN.%5BCl-%5D.%5BCl-%5D could not be loaded.