ERROR opening https://cactus.nci.nih.gov/chemical/structure/Brc1c%28OC%29cc%28cc1OC%29Cc2cnc%28nc2N%29N/file?format=sdf&get3d=True  -- Brc1c%28OC%29cc%28cc1OC%29Cc2cnc%28nc2N%29N could not be loaded.