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. Author manuscript; available in PMC: 2015 Jun 18.
Published in final edited form as: Adv Pharmacol. 2014;69:581–620. doi: 10.1016/B978-0-12-420118-7.00015-9

Figure 15.2.

Figure 15.2

Structures of the four simplest phenylpropanolamines: (1R,2S)(−) norephedrine, (1S,2R)(+)norephedrine, (1R,2R)(−)pseudonorephedrine, and (1S,2S)(+)pseudonorephedrine or cathine. Introduction of an N-methyl group would afford the corresponding four optical isomers of ephedrine.