Number | Date | Country | Kind |
---|---|---|---|
11883/78 | Nov 1978 | CHX |
Number | Name | Date | Kind |
---|---|---|---|
3900419 | Schlapfer et al. | Aug 1975 | |
3932446 | Grychtol | Jan 1976 | |
3940417 | Schlapfer | Feb 1976 | |
4001138 | Lohmann | Jan 1977 | |
4189589 | Meyer et al. | Feb 1980 |
Number | Date | Country |
---|---|---|
2346316 | Mar 1975 | DEX |
2733439 | Feb 1978 | DEX |
Entry |
---|
Chemistry of Heterocyclic Compounds, Weissberger, pp. 280-284, by Hofmann, Pub. by Interscience, New York, 1953. |