Claims
- 1. Compounds of the formula: ##STR8## wherein R.sub.1 is hydrogen, lower alkyl (C.sub.1-6) phenyl or a thienyl,
- R.sub.2 is hydrogen, or
- R.sub.1 and R.sub.2 taken together with the carbon to which they are attached is a cycloalkyl (C.sub.5-7) group,
- R.sub.3 is hydrogen or lower alkylthio (C.sub.1-6), and
- M is hydrogen or a nontoxic, pharmaceutically acceptable cation,
- provided that R.sub.3 is lower alkylthio (C.sub.1-6) when R.sub.1 is phenyl.
- 2. Compounds according to claim 1, wherein
- R.sub.1 is phenyl,
- R.sub.2 is hydrogen, and
- R.sub.3 is lower alkylthio (C.sub.1-6).
- 3. A compound according to claim 2, wherein,
- R.sub.3 is methylthio, and
- M is hydrogen,
- 4. Compounds according to claim 1, wherein R.sub.3 and M are hydrogen.
- 5. Compounds according to claim 4, wherein
- R.sub.1 is hydrogen, cyclohexyl, or 2-thienyl,
- R.sub.2 is hydrogen, or
- R.sub.1 and R.sub.2 taken together with the carbon to which they are attached is a cyclohexyl group.
- 6. A compound according to claim 4, wherein R.sub.1 and R.sub.2 are hydrogen.
- 7. A compound according to claim 4, wherein
- R.sub.1 is 2-thienyl, and
- R.sub.2 is hydrogen.
- 8. A compound according to claim 4, wherein
- R.sub.1 is cyclohexyl, and
- R.sub.2 is hydrogen.
- 9. A compound according to claim 4, wherein R.sub.1 and R.sub.2 taken together with the carbon to which they are attached is a cyclohexyl group.
Priority Claims (2)
Number |
Date |
Country |
Kind |
47-115983 |
Nov 1972 |
JPX |
|
48-18636 |
Feb 1973 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 396,580, filed Sept. 12, 1973, now U.S. Pat. No. 4,094,872.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3898217 |
Sellstedt et al. |
Aug 1975 |
|
3923795 |
Spry |
Sep 1975 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
42-07474 |
Mar 1967 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
396580 |
Sep 1973 |
|