Number | Name | Date | Kind |
---|---|---|---|
2885420 | Spiegler | May 1959 | |
3020262 | Speranza | Feb 1962 | |
3334110 | Schramm | Aug 1967 | |
3471442 | DiLeone | Oct 1969 | |
3781229 | Smith et al. | Dec 1973 | |
3817938 | Ashida et al. | Jun 1974 | |
3905945 | Iseda et al. | Sep 1975 | |
4022721 | Ashida | May 1977 |
Entry |
---|
Elderfield, Heterocyclic Compounds, (1957), pp. 396-402, vol. 5. |