Number | Date | Country | Kind |
---|---|---|---|
51-111124 | Sep 1976 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3782941 | Hartman et al. | Jan 1974 | |
3887597 | Ohkubo et al. | Jun 1975 | |
3933507 | Von Konig et al. | Jan 1976 |
Entry |
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Richter, Textbook of Organic Chemistry, pp. 136-139, John Wiley & Sons, New York, (1952). |