ERROR opening https://cactus.nci.nih.gov/chemical/structure/OCc1nn%28C%29c%28n1%29NCCCOc2cccc%28c2%29CN3CCCCC3/file?format=sdf&get3d=True  -- OCc1nn%28C%29c%28n1%29NCCCOc2cccc%28c2%29CN3CCCCC3 could not be loaded.