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Preparations from the parotid gland venom of the toad Bufo marinus have been analyzed by paper chromatography for the presence of adrenalin precursors. In addition to adrenalin itself, hydroxytyramine was identified and a second compound which appeared to be an adrenalin ester-perhaps lactyl-adrenalin. Two other compounds which appeared on the chromatogram could not be identified. Neither noradrenalin nor another possible precursor, epinine, appeared to be present.

ADRENALIN AND HYDROXYTYRAMINE IN THE PAROTID GLAND VENOM OF THE TOAD, BUFO MARINUS