What is PROTAGON?

A crystalline substance discovered in nervous tissue, by Liebreich. It separates out from warm alcohol on gradual cooling in the form of very small needles, often arranged in groups; it is slightly soluble in cold, more soluble in hot alcohol, and in ether. It is insoluble in water, but swells up and forms a gelatinous mass. It melts at 200

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Definition of  PROTAGON