PT - JOURNAL ARTICLE AU - NATHAN B. EDDY TI - STUDIES OF MORPHINE, CODEINE AND THEIR DERIVATIVES XII. THE ISOMERS OF MORPHINE AND DIHYDROMORPHINE DP - 1936 Apr 01 TA - Journal of Pharmacology and Experimental Therapeutics PG - 421--431 VI - 56 IP - 4 4099 - http://jpet.aspetjournals.org/content/56/4/421.short 4100 - http://jpet.aspetjournals.org/content/56/4/421.full SO - J Pharmacol Exp Ther1936 Apr 01; 56 AB - The general pharmacological activity of the isomers of morphine and dihydromorphine is described. In addition the activity of four groups of isomers in the morphine, codeine series, the structural relationships in each group being the same, is discussed in relation to the chemical modifications. It is suggested that the pharmacological relationships afford a basis for pairing the isomers, a pairing at present impossible by chemical means.