| Number | Name | Date | Kind |
|---|---|---|---|
| 4531969 | Nestler et al. | Jul 1985 | |
| 5234894 | Ishizaki et al. | Aug 1993 |
| Number | Date | Country |
|---|---|---|
| 0270378 | Jun 1988 | EPX |
| 0506373 | Sep 1992 | EPX |
| 0109483 | May 1994 | EPX |
| 2223894 | Dec 1973 | DEX |
| 2046753 | Nov 1980 | GBX |
| Entry |
|---|
| Abstract of Japanese Laid-Open Application 54525/May 1974. |
| Abstract of Japanese Laid-Open Application 2237/Feb. 1979. |
| Abstract of Japanese Laid-Open Application 11452/Jan. 1985. |
| Chemical Abstract, 102, No. 25, 220 443 (Abstract of Japanese Kokai 60-008,253). (Month Not Available ) 1985. |
| Thornber, Chemical Society Reviews, vol. 8, No. 1, @1979, pp. 563-580. |