Number | Date | Country | Kind |
---|---|---|---|
3715779 | May 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4255336 | Albert et al. | Mar 1981 | |
4537920 | Roper | Aug 1985 | |
4797421 | Ariga et al. | Jan 1989 |
Number | Date | Country |
---|---|---|
39844 | Nov 1981 | EPX |
2591594 | Jun 1987 | FRX |
1204180 | Sep 1986 | JPX |
Entry |
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Costa et al., J. Chem. Soc. Perkin I, (1985), 799. |