Claims
- 1. A compound of the formula ##STR5## wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl, trifluoromethyl, benzyl, phenyl or tolyl.
- 2. The compound of claim 1 wherein R.sup.1 is tolyl.
- 3. The compound of claim 1 wherein R.sup.1 is methyl or trifluoromethyl.
Parent Case Info
This application is a division of application Ser. No. 07/881,913, filed May 12, 1992, now U.S. Pat. No. 5,256,807, which is a division of application Ser. No. 07/770,676, filed Oct. 3, 1991 now U.S. Pat. No. 5,183,910, which is a division of 07/518,384 filed May 3, 1990, now U.S. Pat. No. 5,097,049.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4331605 |
Martel et al. |
May 1982 |
|
Divisions (3)
|
Number |
Date |
Country |
Parent |
881913 |
May 1992 |
|
Parent |
770676 |
Oct 1991 |
|
Parent |
518384 |
May 1990 |
|