| Number | Name | Date | Kind |
|---|---|---|---|
| 3630697 | Duling et al. | Dec 1971 | |
| 4813975 | Poulina et al. | Mar 1989 |
| Number | Date | Country |
|---|---|---|
| 63-42652 | Feb 1988 | JPX |
| 840382 | May 1986 | NLX |
| Entry |
|---|
| Bepu, N., Chemical Abstracts, CA 106(4):20292g, 1986. |
| Lin, T. J., Chemical Abstracts, CA 80(16):87430p, 1974. |
| G.G. Hawley, Condensed Chemical Dictionary 864-65, 920, published before Feb. 22, 1984, New York. |