ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BGa%2B3%5D.%5BGa%2B3%5D.%5BAs-3%5D.%5BPH3-3%5D/file?format=sdf&get3d=True -- %5BGa%2B3%5D.%5BGa%2B3%5D.%5BAs-3%5D.%5BPH3-3%5D could not be loaded.