Number | Date | Country | Kind |
---|---|---|---|
3821334 | Jun 1988 | DEX |
Number | Date | Country |
---|---|---|
0742737 | Jun 1970 | BEX |
3244178 | May 1984 | DEX |
Entry |
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Chemical Abstracts, vol. 109, No. 11, Abstract 92803j, Sep. 12, 1988, p. 690, Nakajima et al. |
Chemical Abstracts, vol. 110, No. 9, Abstract 75331g, Feb. 27, 1989, p. 634, Nakajima et al. |