ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCN%28CC1%29C1%3Dc2cc%28C%29sc2%3DNc2ccccc2N1/file?format=sdf&get3d=True -- CN1CCN%28CC1%29C1%3Dc2cc%28C%29sc2%3DNc2ccccc2N1 could not be loaded.