Number | Date | Country | Kind |
---|---|---|---|
20274 A/88 | Apr 1988 | ITX |
Number | Name | Date | Kind |
---|---|---|---|
4447639 | Sofranko et al. | May 1984 |
Number | Date | Country |
---|---|---|
0245631 | Nov 1987 | EPX |
1668639 | Jul 1971 | DEX |
Entry |
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Sorokina et al., Chemical Abstracts, vol. 77, No. 1, Jul. 1972, 5823v. |