General, Organic, and Biological Chemistry - 4th edition
4th Edition
ISBN: 9781259883989
Author: by Janice Smith
Publisher: McGraw-Hill Education
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Chapter 25.5, Problem 25.13P
(a) Which compound, morphine or heroin, is more polar? (b) Which compound can cross the blood-brain barrier more readily? (c) Explain why heroin is a more potent pain reliever than morphine. 
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