Number | Date | Country | Kind |
---|---|---|---|
198 57 949 | Dec 1998 | DE |
Number | Name | Date | Kind |
---|---|---|---|
4525310 | Theis et al. | Jun 1985 | |
4534910 | Peeters et al. | Aug 1985 | |
4701526 | Kobe et al. | Oct 1987 | |
4868302 | Schneider | Sep 1989 | |
4948890 | Schneider | Aug 1990 | |
5502125 | Bordeianu et al. | Mar 1996 | |
5663338 | Ramert et al. | Sep 1997 | |
5777152 | Theis et al. | Jul 1998 |
Number | Date | Country |
---|---|---|
35 44 461 | Jul 1986 | DE |
37 23 874 | Jan 1989 | DE |
37 29 471 | Mar 1989 | DE |
41 36 114 | May 1993 | DE |
0 267 594 | May 1988 | EP |
0 304 004 | Feb 1989 | EP |
0 415 028 | Mar 1991 | EP |
0 541 003 | May 1993 | EP |
Entry |
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Roland K. Robins, et al., “Purines. II. The Synthesis of Certain Purines and the Cyclization of Several Substituted 4,5-diaminopyrimidines”, J. Am. Chem. Soc., Vo. 75, pp. 263-266, Jan. 20, 1953. |