Number | Name | Date | Kind |
---|---|---|---|
1713968 | Lea et al. | May 1929 | |
1865008 | Holm | Jun 1932 | |
1875105 | Muggleton et al. | Aug 1932 | |
1878013 | Staib | Sep 1932 |
Number | Date | Country |
---|---|---|
7,008,513 | Dec 1970 | NL |
Entry |
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Hille et al., "Angew. Chem.," vol. 72, 1960, pp. 850-855. |