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US4178291A
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Substituted acyl derivatives of amino acids
Assignee: ER Squibb and Sons LLC
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Filing: 1978-12-04
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Granted: 1979-12-11
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Expires: 1998-12-04
Abstract
Abstract New substituted acyl derivatives of amino acids which have the general formula ##STR1## are useful as angiotension converting enzyme inhibitors.
Inventors
- 👤 Miguel A. Ondetti
- 👤 Frank L. Weisenborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:44
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/60; C07C; C07C323/00; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
45 words
A compound of the formula ##STR17## wherein R 1 is hydroxy or lower alkoxy; A is hydrogen, lower alkyl or hydroxy-lower alkylene; and B is hydrogen, lower alkyl, hydroxy-lower alkylene, amino-lower alkylene, guanidino-lower alkylene, mercapto-lower alkylene, lower alkylmercapto-lower alkylene, carbamoyl-lower alkylene or carboxy lower alkylene.
Claim 2
Dependent Claim
45 words
A compound of the formula ##STR17## wherein R 1 is hydroxy or lower alkoxy; A is hydrogen, lower alkyl or hydroxy-lower alkylene; and B is hydrogen, lower alkyl, hydroxy-lower alkylene, amino-lower alkylene, guanidino-lower alkylene, mercapto-lower alkylene, lower alkylmercapto-lower alkylene, carbamoyl-lower alkylene or carboxy lower alkylene.
Claim 3
Dependent Claim
26 words
A compound as in claim 1 wherein ##STR18## is the radical of glycine, alanine, leucine, threonine, lysine, arginine, glutamine, methionine, serine, cysteine, valine, asparagine, glutamic acid.
References Cited (Backward Citations)
US2714119A
Cited
US3031372A
Cited
US3510504A
Cited
US3624143A
Cited
US3843796A
Cited
US3835149A
Cited
US3971828A
Cited
US4046889A
Cited
US4053651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |