ç is a poisonous alkaloid (chemical formula C₂₂H₂₅NO₆) found in the corm of the autumn crocus or meadow saffron (Colchicum autumnale). It is used in genetic and cellular research, as it inhibits mitosis (cell division). This property makes colchicine valuable in cancer research and as immunosuppressant drug. Melting point 156°C.