ERROR opening https://cactus.nci.nih.gov/chemical/structure/OCC3OC%28c1ccc2ccccc2%28c1%28OC%29%29%29CC3%28O%29/file?format=sdf&get3d=True  -- OCC3OC%28c1ccc2ccccc2%28c1%28OC%29%29%29CC3%28O%29 could not be loaded.