Patent US4073786A successfully refreshed from Google Patents.
US4073786A
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2-Amino-4-hydroxy-6-hydroxymethyl-7,7-diethyl-7,8-dihydropteridine and the 7-spirocyclohexyl analogue thereof
Assignee: SmithKline Beecham Corp
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Filing: 1975-07-31
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Granted: 1978-02-14
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Expires: 1995-07-31
Abstract
Abstract Novel pteridines of formula (I), ##STR1## wherein R is a lower alkyl group, optionally substituted with a hydroxy group and R 1 and R 2 are the same or different and each is a lower alkyl group having together at least 3 carbon atoms or R 1 and R 2 , together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation. The above compounds have bacteriostatic activity.
Inventors
- 👤 Hamish C. S. Wood
- 👤 Irene Stirling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:38
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D475/00; C07D475/02; C07D475/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
2-amino-4-hydroxy-6-hydroxymethyl-7,7-diethyl-7,8-dihydropteridine or a tautomeric form thereof.
Claim 2
Dependent Claim
6 words
2-amino-4-hydroxy-6-hydroxymethyl-7,7-diethyl-7,8-dihydropteridine or a tautomeric form thereof.
Claim 3
Dependent Claim
10 words
A pharmaceutically acceptable salt of the compound of claim 1.
Claim 4
Dependent Claim
6 words
2-amino-4-hydroxy-6-hydroxymethyl-7-spirocyclohexyl-7,8-dihydropteridine or a tautomeric form thereof.
Claim 5
Dependent Claim
6 words
2-amino-4-hydroxy-6-hydroxymethyl-7-spirocyclohexyl-7,8-dihydropteridine or a tautomeric form thereof.
Claim 6
Dependent Claim
10 words
A pharmaceutically acceptable salt of the compound of claim 3.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |