ERROR opening https://cactus.nci.nih.gov/chemical/structure/NCCc1cc%28OC%29c%28cc1OC%29c1ccc%28cc1%29OC/file?format=sdf&get3d=True  -- NCCc1cc%28OC%29c%28cc1OC%29c1ccc%28cc1%29OC could not be loaded.