Number | Name | Date | Kind |
---|---|---|---|
3442907 | Donche et al. | May 1969 | |
3489771 | Donche et al. | Jan 1970 | |
4060628 | Enders et al. | Nov 1977 | |
4131683 | Harrison et al. | Dec 1978 | |
4172941 | Harrison et al. | Oct 1979 |
Entry |
---|
Nakai et al., Tetrahedron Letters, 39 (1967) pp. 3835-3838. |