Number | Name | Date | Kind |
---|---|---|---|
3171816 | Peter et al. | Mar 1965 | |
4343376 | Tsukagoshi et al. | Aug 1982 | |
4755337 | Takahashi et al. | Jul 1988 |
Number | Date | Country |
---|---|---|
56-168494 | Dec 1981 | JPX |
59-30708 | Feb 1984 | JPX |
Entry |
---|
The Merck Index (9th. ed. 1976) at pp. 1252 & CI-254. |