# US 5,350,767 A · Derivatives of cysteine

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- Number: US 5,350,767 A
- Document ID: US5350767A
- Status: Granted
- Kind: A
- Application number: 07/936,615
- Filed: 1992-08-27
- Granted: 1994-09-27
- Earliest claimed: 1987-11-19
- Assignees: Aktiebolaget Draco
- Inventors: Anders R. Hallberg; Per A. S. Tunek
- Web page: https://patentgrep.com/patent/US5350767A

## CPC

- C07C 323/59: with acylated amino groups bound to the carbon skeleton
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A compound of the formula ##STR1## wherein R is --CH(CH.sub.3).sub.2 or --C(CH.sub.3).sub.3 or a physiologically acceptable salt or optical isomer thereof useful for the treatment of particularly different lung diseases.

## Claims

### Claim 1

A method for the treatment of lung diseases in mammals caused or maintained by oxidative stress, which comprises oral administration to a subject in need of such treatment of an effective amount of a pharmaceutical composition comprising as the active ingredient an effective amount of a compound of the formula: ##STR14## wherein R is --CH(CH.sub.3).sub.2 or --C(CH.sub.3).sub.3 or a physiologically acceptable salt or an optical isomer thereof.

### Claim 2 (depends on 1)

A method according to claim 1, wherein R is --CH(CH.sub.3).sub.2.

### Claim 3 (depends on 1)

A method according to claim 1, wherein the optical isomer is the D-isomer.