Number | Name | Date | Kind |
---|---|---|---|
2704710 | Sprung | Jan 1979 | |
3996232 | Diamond et al. | Dec 1976 | |
4137332 | Brown et al. | Jan 1979 |
Number | Date | Country |
---|---|---|
716560 | Oct 1954 | GBX |
Entry |
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Wheeler Henry, et al., "On a Class of Pseudothioureas Described as Normal Ureas." J. A. C. S. vol. 25 (1903) pp. 719-722. |