ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1cc2c%28c%28c1OC%29O%29C%5BC%40%40%5D23COc4cc%28cc%28c4C3%3DO%29O%29O/file?format=sdf&get3d=True  -- COc1cc2c%28c%28c1OC%29O%29C%5BC%40%40%5D23COc4cc%28cc%28c4C3%3DO%29O%29O could not be loaded.