Claims
- 1. A compound of the formula ##STR22## wherein R.sup.15 is (C.sub.1 -C.sub.3)alkyl; and
- R.sup.16 is (C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkenyl, phenyl, naphthyl, (C.sub.4 -C.sub.7)cycloalkyl, (C.sub.4 -C.sub.7)cycloalkenyl, C.sub.7 -C.sub.9)phenylalkyl, (C.sub.11 -C.sub.13)naphthylalkyl, (C.sub.5 -C.sub.10)(cycloalkyl)alkyl, or one of said groups mono or disubstituted on the aromatic ring with the same or different groups selected from (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)alkoxy, fluoro or chloro.
- 2. A compound of claim 1 wherein R.sup.16 is cyclohexylmethyl.
- 3. The compound of claim 2 wherein R.sup.15 is ethyl.
CROSS REFERENCE TO RELATED APPLICATION
This is a division of application Ser. No. 858,324, filed on Apr. 30, 1986, now U.S. Pat. No. 4,729,985 which is a continuation in part of application Ser. No. 764,168, filed Aug. 8, 1985, now abandoned.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
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Parent |
858324 |
Apr 1986 |
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Continuation in Parts (1)
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Number |
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764168 |
Aug 1985 |
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