Number | Date | Country | Kind |
---|---|---|---|
91 10261 | Aug 1991 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3733333 | Behner et al. | May 1973 | |
5095031 | Brooks et al. | Mar 1992 |
Number | Date | Country |
---|---|---|
0949228 | Feb 1964 | GBX |
Entry |
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Berrier et al., Chemical Abstracts vol. 109, Abst. 73865 (1988). |
Chemical Abstracts vol. 55, Abst. 104871 (1961). |