Claims
- 1. A compound of the formula ##STR14## wherein R.sup.1 and R.sup.2 are independently of each other methyl or ethyl, and R.sup.3 is benzyl.
- 2. A compound according to claim 1 which is 4-benzyl-2,2,6,6-tetramethyl-3,5-diketopiperazine.
RELATED APPLICATION
This is a continuation of application Ser. No. 835,759 filed on Sept. 22, 1977 now U.S. Pat. No. 4,125,517 issued Nov. 14, 1978 which is a divisional of Application Ser. No. 633,202 filed Nov. 19, 1975, now U.S. Pat. No. 4,051,137, which is a divisional of Ser. No. 391,200 filed Aug. 24, 1973, now U.S. Pat. No. 3,928,357, which is a continuation-in-part Application Ser. No. 237,982, filed Mar. 24, 1972, now abandoned.
US Referenced Citations (5)
Divisions (2)
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Number |
Date |
Country |
Parent |
633202 |
Nov 1975 |
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Parent |
391200 |
Aug 1973 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
835759 |
Sep 1977 |
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