ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BB-%5D%28F%29%28F%29%28F%29F.C1%3DCC%3DCC%3DN1%5BI%2B%5DN2C%3DCC%3DCC%3D2/file?format=sdf&get3d=True  -- %5BB-%5D%28F%29%28F%29%28F%29F.C1%3DCC%3DCC%3DN1%5BI%2B%5DN2C%3DCC%3DCC%3D2 could not be loaded.