Number | Name | Date | Kind |
---|---|---|---|
3439051 | Levine | Apr 1969 | |
3755362 | Asinger et al. | Aug 1973 |
Number | Date | Country |
---|---|---|
1,957,860 | May 1971 | DT |
Entry |
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Levine, "American Chemical Society Abstracts of Papers," (1968), 155th Meeting, p. 24. |
Friedman et al., "J. Org. Chem.," vol. 37 (1972), p. 1902. |