ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc2ccccc2CNCCc%28cc1OC%29c%28OC%29cc1Cl/file?format=sdf&get3d=True  -- COc2ccccc2CNCCc%28cc1OC%29c%28OC%29cc1Cl could not be loaded.