ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccnc%28c1%29OCc2ccc%28cc2%29Cc3cc%28on3%29c4cccnc4N/file?format=sdf&get3d=True  -- c1ccnc%28c1%29OCc2ccc%28cc2%29Cc3cc%28on3%29c4cccnc4N could not be loaded.