{
                    "tasks": ["filter_empty",
                              "disconnect_metal",
                              "clear_mixtures",
                              "deglycosylate",
                              "filter_num_heavy_atoms",
                              "filter_molecular_weight",
                              "filter_num_rings",
                              "filter_elements",
                              "sanitize"],
                    "filter_num_heavy_atoms": "num_heavy_atoms > 3",
                    "filter_molecular_weight": "molecular_weight <= 1000.0",
                    "filter_num_rings": "num_rings > 0",
                    "filter_elements": "elements in {H, B, C, N, O, F, P, S, Cl, Br, I}"

}