Number | Date | Country | Kind |
---|---|---|---|
52-25654 | Mar 1977 | JPX | |
52-25655 | Mar 1977 | JPX | |
52-153898 | Dec 1977 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3931205 | Nakanishi et al. | Jan 1976 | |
4066655 | Connor et al. | Jan 1978 |
Entry |
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Petersen et al., Liebigs Ann. Chem., (1976), pp. 1659-1662. |