ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCc1c%28ccc%28c1O%29C%28%3DO%29C%29OCCCOc2ccc%28cc2%29OCC%28%3DO%29O/file?format=sdf&get3d=True -- CCCc1c%28ccc%28c1O%29C%28%3DO%29C%29OCCCOc2ccc%28cc2%29OCC%28%3DO%29O could not be loaded.