Number | Date | Country | Kind |
---|---|---|---|
2651574 | Nov 1976 | DEX | |
2737630 | Aug 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3287461 | Gray | Nov 1966 | |
3699123 | Seemann et al. | Oct 1972 |
Number | Date | Country |
---|---|---|
1404003 | Aug 1975 | GBX |
Entry |
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Chemical Abstracts, 56:11560c (1962) [Gray, A. et al., J. Org. Chem. 26, 3368-3373 (1961)]. |