[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a hydracid and a one-carbon compound. It is a conjugate acid of a carbidoselenidonitrate(1-). It is a tautomer of a (methylidyneammoniumyl)selanide."}, {"from": "gpt", "value": "[C-1][#N+1][Se]"}]