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5-168512 | Jun 1993 | JPX |
Number | Name | Date | Kind |
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4137413 | Ohta | Jan 1979 | |
4148638 | Ohta et al. | Apr 1979 |
Number | Date | Country |
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62-249166 | Oct 1987 | JPX |
64-57261 | Mar 1989 | JPX |
4-149450 | May 1992 | JPX |
Entry |
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Chemical Abstract Service: CA114:102739 Grigg et al. Tetrahedron Lett (1990), 31 (49), 7215-18. |