Number | Date | Country | Kind |
---|---|---|---|
8117642 | Jun 1981 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
RE16394 | Callsen | Jul 1926 | |
1572768 | Callsen | Feb 1926 | |
1860286 | Hartmann et al. | May 1932 | |
4343805 | Crossley et al. | Aug 1982 |
Number | Date | Country |
---|---|---|
430960 | Jun 1926 | DE2 |
1049379 | Jan 1959 | DEX |
Entry |
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Gilman et al., J. Am. Chem. Soc., vol. 71, pp. 3667-3668 (1949). |
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