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nature : also known as phenylephrine, phenylephrine. Commonly used its hydrochloride. The white crystalline powder. The temperature of 140 ° C to 145. Water soluble. The main excitement α receptor, can vascular contraction of the heart stimulant weaker, but may make reflex bradycardia. For peripheral circulatory failure and room paroxysmal tachycardia, but also for the control of narcotic and hypotension mydriasis inspection. First acetophenone made between benzoyloxy acetophenone, and then made ω - benzyl A ammonia during dihydroxyacetophenone and then by hydrogenation, which split in the system.
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