ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1cc2c+%28cc1O%29c+%28c%5BnH%5D2%29CCN/file?format=sdf&get3d=True -- c1cc2c+%28cc1O%29c+%28c%5BnH%5D2%29CCN could not be loaded.