Number | Date | Country | Kind |
---|---|---|---|
8313/90 | Dec 1990 | HUX |
Number | Name | Date | Kind |
---|---|---|---|
4152519 | Parcor | May 1979 | |
4888351 | Imaki | Dec 1989 |
Entry |
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Lewin, Heterocycles 14, 1915 (1980). |
Chem. Abstracts, vol. 94,157125H (1981) G. Lewin et al. |
Journal of Chem. Society, Perkin Transactions 1. 1987, Letchworth, GB pp. 155 to 161. |