ERROR opening https://cactus.nci.nih.gov/chemical/structure/Brc3cc%28OC%29cc1c3oc%28c1%29C2CCNCC2/file?format=sdf&get3d=True -- Brc3cc%28OC%29cc1c3oc%28c1%29C2CCNCC2 could not be loaded.