(+)-Trimethaphan Camphorsulfonate is a derivative of biotin (389040). Trimethaphan is used as a ganglionic blocker in hypertension. Growth factor present in minute amounts in every living cell. Plays an indispensable role in numerous naturally occurring carboxylation reactions. Occurs mainly bound to proteins or polypeptides. The richest sources are liver, kidney, pancreas, yeast, and milk. The biotin content of cancerous tumors is higher than that of normal tissue.