US4257940A
Expired / Lapsed
US
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Valylleucyllysine derivatives, process for producing same and method for measuring activity of enzymes using same
Assignee: Torii and Co Ltd
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Filing: 1979-10-25
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Granted: 1981-03-24
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Expires: 1999-10-25
Abstract
Abstract A valylleucyllysine derivative represented by the formula, ##STR1## wherein R 1 represents hydrogen or benzoyl and R 2 represented naphthyl. The above compound is useful as an excellent substrate for various anzymes, such as, trypsin, plasmin, kallikrein, urokinase, Cl-esterase and the like. Accordingly, the activity of enzymes can be measured by use of said compound as a substrate.
Inventors
- 👤 Setsuro Fujii
- 👤 Mamoru Sugimoto
- 👤 Takashi Yaegashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:58
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/34; C12Q1/37; C07; C07K; C07K5/00; C07K5/04; C07K5/08; C07K5/0802; C07K5/0804; C07K5/0808; C12Q1/56; C12Q2334/00; C12Q2334/30; G; G01; G01N; G01N2333/00; G01N2333/90; G01N2333/914; G01N2333/948; G01N2333/968; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
A valylleucyllysine derivative represented by the formula, ##STR11## wherein R 1 represents hydrogen or benzoyl and R 2 represents naphthyl.
Claim 2
Dependent Claim
20 words
A valylleucyllysine derivative represented by the formula, ##STR11## wherein R 1 represents hydrogen or benzoyl and R 2 represents naphthyl.
Claim 3
Dependent Claim
3 words
D-valyl-L-leucyl-L-lysine 1-naphthyl ester.
Claim 4
Dependent Claim
3 words
D-valyl-L-leucyl-L-lysine 1-naphthyl ester.
Claim 5
Dependent Claim
3 words
N-benzoyl-L-valyl-L-leucyl-L-lysine 1-naphthyl ester.
Claim 6
Dependent Claim
3 words
N-benzoyl-L-valyl-L-leucyl-L-lysine 1-naphthyl ester.
References Cited (Backward Citations)
US4137225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |