ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29nc%28n2C3%3DCCN%28CC3%29CCCC%28%3DO%29c4ccc%28cc4%29F%29O/file?format=sdf&get3d=True -- c1ccc2c%28c1%29nc%28n2C3%3DCCN%28CC3%29CCCC%28%3DO%29c4ccc%28cc4%29F%29O could not be loaded.