Claims
- 1. A compound of the formula ##STR8## wherein R.sub.1 and R.sub.2 are lower alkyl; and R.sub.4 and R.sub.5 taken together with their attached nitrogen atom form the phthalimido group.
Parent Case Info
This is a division of application Ser. No. 457,340 filed Apr. 3, 1974 -- DAVID D. KEITH and MANFRED WEIGELE -- NOVEL BUTANOIC ACID DERIVATIVES, now U.S. Pat. No. 3,887,615.
Non-Patent Literature Citations (1)
Entry |
black et al., "Chem. Abstracts," vol. 77, (1972) No. 127024f. |
Divisions (1)
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Number |
Date |
Country |
Parent |
457340 |
Apr 1974 |
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