Number | Date | Country | Kind |
---|---|---|---|
3737537 | Nov 1987 | DEX |
Number | Date | Country |
---|---|---|
3434818 | Apr 1985 | DEX |
2270304 | May 1975 | FRX |
1163840 | Sep 1969 | GBX |
1502998 | Mar 1978 | GBX |
2148921 | Jun 1985 | GBX |
Entry |
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Houben-Weyl, Methoden der Organischen Chemie, vol. 10/2, 1967, pp. 487 and 488. |