Number | Name | Date | Kind |
---|---|---|---|
1689536 | Meerwein | Oct 1928 | |
3060216 | Hamprecht et al. | Oct 1962 | |
3394158 | Chini et al. | Jul 1968 | |
3631083 | Hartmann | Dec 1971 | |
3761500 | Thomas | Sep 1973 | |
3773733 | Matsushima | Nov 1973 | |
3773816 | Honigschmid-Grossich et al. | Nov 1973 | |
3903122 | Thomas | Sep 1975 | |
4120883 | Sakurai et al. | Oct 1978 | |
4146549 | Aishima et al. | Mar 1979 |