Number | Date | Country | Kind |
---|---|---|---|
2-9298 | Jan 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3145222 | Brace | Aug 1964 | |
4073817 | Jager | Feb 1978 | |
4489006 | Krahler | Dec 1984 |
Number | Date | Country |
---|---|---|
0043757 | Jan 1982 | EPX |
Entry |
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Chemical Abstracts, vol. 81, No. 25, Dec. 23, 1974, p. 510. |
Park, et al., J. Org. Chem., 26, 2089, 1961. |