2-(1-Piperazinyl)-4-amino-6,7-dimethoxyquinazoline;2-(4-Piperazinyl)-4-amino-6,7-dimethoxyquinazoline;4-Amino-2-(1-piperazinyl)-6,7-dimethoxyquinazoline;4-Amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline;
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