Alpha-and- beta-activity of O-methylated derivatives of norepinephrine and epinephrine
- PMID: 844582
- DOI: 10.1007/BF02124099
Alpha-and- beta-activity of O-methylated derivatives of norepinephrine and epinephrine
Abstract
Metanephrine, iso-metanephrine, normetanephrine and isonormetaephrine were tested for alpha- and beta-activity on various tissues obtained from rats, guinea-pigs and cats. It was found that methylation of the hydroxyl groups of norepinephrine or epinephrine in either the 3- or 4-position markedly reduces or abolishes alpha- and beta-activity with the exception of the nictitating membrane of the cat. This receptor seems to show a tissue difference.
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