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US 4,058,530 AGranted
Amino acid esters
AssigneeMerck & Co., Inc.
InventorWalfred S. Saari
Life of this patent
Estimating the term…
Abstract
Derivatives of .alpha.-methyl-3,4-dihydroxyphenylalanine which are useful in compositions as anti-hypertensive agents.
Claims10
A compound of the formula ##STR22## wherein n is 0, 1, 2 or 3;
- m is 0, 1, 2 or 3;
- A.sub.1 and A.sub.2 are individually H or a lower alkanoyl group;
- R.sub.1 and R.sub.2 are individually H or alkyl of 1 to 3 carbon atoms and;
- ##STR23## or a pharmaceutically acceptable acid addition salt thereof.
1 more element
An ester of the L isomer of an amino acid, substantially free of the D isomer, having the formula ##STR24## wherein n is 0, 1, 2 or 3;
- m is 0, 1, 2 or 3;
- R.sub.1 and R.sub.2 are individually H or alkyl of 1 to 3 carbon atoms and;
- ##STR25## or a pharmaceutically acceptable acid addition salt thereof.
Dependencies are inferred from the claim text.