Number | Date | Country | Kind |
---|---|---|---|
2194/85 | Jun 1985 | HUX |
Number | Name | Date | Kind |
---|---|---|---|
3547621 | Neighbors et al. | Dec 1970 |
Number | Date | Country |
---|---|---|
719039 | Feb 1969 | BEX |
Entry |
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Degering, Ed. F. An Outline of Organic Nitrogen Compounds (1950), at p. 181, Publ. Univ. Lithoprinters, Ypsilanti, Mich. |