ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DCOC%28%3DCC1%3DO%29CSP%28%3DO%29%28OC%29OC/file?format=sdf&get3d=True  -- COC1%3DCOC%28%3DCC1%3DO%29CSP%28%3DO%29%28OC%29OC could not be loaded.