ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DP%28Oc1ccccc1%29%28Oc2ccccc2%29Oc3ccccc3/file?format=sdf&get3d=True  -- O%3DP%28Oc1ccccc1%29%28Oc2ccccc2%29Oc3ccccc3 could not be loaded.