ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc2ccc%28cc2%29CNC%28CC3%29COC3C%28c1ccccc1%29c4ccccc4/file?format=sdf&get3d=True  -- Oc2ccc%28cc2%29CNC%28CC3%29COC3C%28c1ccccc1%29c4ccccc4 could not be loaded.