1BOZ:
reference: Structure-based design and synthesis of lipophilic 2,4-diamino-6-substituted quinazolines and their evaluation as inhibitors of dihydrofolate reductases and potential antitumor agents., Gangjee A, Vidwans AP, Vasudevan A, Queener SF, Kisliuk RL, Cody V, Li R, Galitsky N, Luft JR, Pangborn W, J Med Chem 1998 Aug 27;41(18):3426-34. PMID: 9719595

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