[CH2:1]([N:5]=[C:6]=[O:7])[CH2:2][CH2:3][CH3:4].[N-]=C=O.[NH2:11][C:12]1[N:17]([C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([NH2:24])[CH:19]=2)[CH2:16][N:15]=[C:14]2[O:25][CH:26]=[CH:27][C:13]=12>>[NH2:11][C:12]1[N:17]([C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([NH:24][C:6]([NH:5][CH2:1][CH2:2][CH2:3][CH3:4])=[O:7])[CH:19]=2)[CH2:16][N:15]=[C:14]2[O:25][CH:26]=[CH:27][C:13]=12The compound was prepared following the procedure described in Example 232(b), using butyl isocyanate as the isocyanate of choice, and 4-Amino-3-(3-aminophenyl)furo[2,3-d]pyrimidine (10) as the diamine of choice. MS(ES) m/e 326 [M+H]+.
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