Number | Date | Country | Kind |
---|---|---|---|
4-346927 | Dec 1992 | JPX |
Number | Date | Country |
---|---|---|
0272671 | Jun 1988 | EPX |
0525420 | Feb 1993 | EPX |
Entry |
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Robinson et al., Chemical Abstracts, vol. 117, No. 3, 20 Jul. 1992 Abstract No. 22302m. |
Ochi et al., Tetrahedron Letters, vol. 33, No. 49, pp. 7531-7534 (1992). |