ERROR opening https://cactus.nci.nih.gov/chemical/structure/COCCOc1cc2c%28cc1OCCOC%29ncnc2Nc3cccc%28c3%29C%23C/file?format=sdf&get3d=True  -- COCCOc1cc2c%28cc1OCCOC%29ncnc2Nc3cccc%28c3%29C%23C could not be loaded.