ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1c3c%28ccc1O%29%5BC%40H%5D4c2c%28cccc2C3%29CNC4/file?format=sdf&get3d=True  -- Oc1c3c%28ccc1O%29%5BC%40H%5D4c2c%28cccc2C3%29CNC4 could not be loaded.