Cl[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([OH:12])[CH:10]=2)[N:5]=[CH:4][N:3]=1.[NH2:13][C:14]1[CH:19]=[N:18][CH:17]=[CH:16][N:15]=1.[CH3:20][CH:21](O)[CH3:22]>>[CH:21]([O:12][C:9]1[CH:10]=[C:11]2[C:6](=[CH:7][CH:8]=1)[N:5]=[CH:4][N:3]=[C:2]2[NH:13][C:14]1[CH:19]=[N:18][CH:17]=[CH:16][N:15]=1)([CH3:22])[CH3:20]The compound of Example 23 was manufactured by the same method as in Example 22, by a similar method thereto or by a combination of such a method with a conventional method using 4-chloro-6-hydroxy-quinazoline, 2-propanol and 2-aminopyrazine.
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