US4304903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D-Erythro-2,3-dihydroxy-1-(1-phenyl-1H-pyrazolo(3,4-b)quinoxalin-3-yl)-propyl-4-O-α-D-glucopyranosyl-alpha-D-glucopyranoside poly(H-sulfate)salts
Assignee: Wyeth Holdings LLC
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Filing: 1980-03-03
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Granted: 1981-12-08
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Expires: 2000-03-03
Abstract
Abstract D-Erythro-2,3-dihydroxy-1-[substituted and unsubstituted)-1-phenyl-1H-pyrazolo[3,4-b]quinoxalin-3-yl]propyl-4-O-.alpha.-D-glucopyranosyl-α-D-glucopyranoside poly(H-sulfate)salts useful as complement inhibitors.
Inventors
- 👤 Vijay G. Nair
- 👤 Seymour Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:03
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A compound of the formula: ##STR3## wherein R is selected from the group consisting of hydrogen and methyl; and X is --SO 3 R'; wherein R' is selected from the group consisting of hydrogen and a pharmaceutically acceptable salt cation.
Claim 2
Dependent Claim
40 words
A compound of the formula: ##STR3## wherein R is selected from the group consisting of hydrogen and methyl; and X is --SO 3 R'; wherein R' is selected from the group consisting of hydrogen and a pharmaceutically acceptable salt cation.
Claim 3
Dependent Claim
12 words
The compound according to claim 1, D-erythro2,3-dihydroxy-1-(1-phenyl-1H-pyrazolo[3,4-b]quinoxalin-3-yl)propyl-4-O-α-D-glucopyranosyl-α-D-glucopyranoside, nonakis (H-sulfate), nonasalt with trimethylamine.
Claim 4
Dependent Claim
10 words
The compound according to claim 1, D-erythro-2,3-dihydroxy-1-(1-phenyl-1H-pyrazolo[3,4-b]quinoxalin-3-yl)propyl-4-O-α-D-glucopyranosyl-α-D-glucopyranoside, nonakis(H-sulfate), nonasodium salt.
Claim 5
Dependent Claim
11 words
The compound according to claim 1, D-erytyro-2,3-dihydroxy-1-(6,7-dimethyl-1-phenyl-1H-pyrazolo[3,4-b]quinoxalin-3-yl)propyl-4-O-α-D-glucopyranosyl-α-D-glucopyranoside, nonakis(H-sulfate), nonasalt with trimethylamine.
Claim 6
Dependent Claim
10 words
The compound according to claim 1, D-erythro-2,3-dihydroxy-1-(6,7-dimethyl-1-phenyl-1H-pyrazolo3,4-b]quinoxalin-3-yl)propyl-4-O-α-D-glucopyranosyl-α-D-glucopyranoside, nonakis(H-sulfate), nonasodium salt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |