Number | Date | Country | Kind |
---|---|---|---|
3047753 | Dec 1980 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3573304 | Eberle et al. | Mar 1971 | |
4322552 | Kleemann et al. | Mar 1982 |
Entry |
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Wagner et al., Synthetic Organic Chemistry, John Wiley & Sons, N.Y., N.Y., 1953, p. 570. |
Farquharson et al., CA 55:23522c (1952). |