Number | Date | Country | Kind |
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1-162646 | Jun 1989 | JPX |
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RE30405 | Fischer | Sep 1980 | |
3806558 | Fischer | May 1974 | |
4160859 | Renner et al. | Jul 1979 | |
4929665 | Inoue et al. | May 1990 |
Entry |
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Loudon, G. Marc. "Organic Chemistry", Addison-Wesley Pub. Co. Reading, Mass., 1984, (pp. 571-575). |