ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28c1ccccc1Cc2ccccc2%29CC%28N3CCCCC3%29C/file?format=sdf&get3d=True -- O%28c1ccccc1Cc2ccccc2%29CC%28N3CCCCC3%29C could not be loaded.