ERROR opening https://cactus.nci.nih.gov/chemical/structure/ClC1%3DCC%3DCC%28N2CCC%28N%29CC2%29%3DN1/file?format=sdf&get3d=True  -- ClC1%3DCC%3DCC%28N2CCC%28N%29CC2%29%3DN1 could not be loaded.