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5855916 | Chiesi et al. | Jan 1999 | A |
5997856 | Hora et al. | Dec 1999 | A |
Number | Date | Country |
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463653 | Jan 1992 | EP |
2710268 | Mar 1995 | FR |
Entry |
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Nath et al. Novel Met-Enkephalin Analogue1 . . . Pharm. Res. vol. 31, No. 5, pp. 269-273, 1995. |