Number | Date | Country | Kind |
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63-172964 | Jul 1988 | JPX |
Number | Name | Date | Kind |
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4797417 | Okamoto et al. | Jan 1989 |
Number | Date | Country |
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1065877 | Apr 1986 | JPX |
Entry |
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Ito et al., "Synthesis and Spectral Characteriztion of .gamma. Hydroxy-.DELTA..alpha..beta.-Butenolides Possessing a Conjugated Substituent in the .beta.-Position", CA 107:237037h. |