Standard InChI: InChI=1S/C21H21N5O6/c1-10(8-13-9-32-19-16(13)17(22)25-21(23)26-19)11-2-4-12(5-3-11)18(29)24-14(20(30)31)6-7-15(27)28/h2-5,8-9,14H,6-7H2,1H3,(H,24,29)(H,27,28)(H,30,31)(H4,22,23,25,26)/b10-8+/t14-/m0/s1
1.Gangjee A, Zeng Y, McGuire JJ, Kisliuk RL.. (2000) Effect of C9-methyl substitution and C8-C9 conformational restriction on antifolate and antitumor activity of classical 5-substituted 2,4-diaminofuro[2,3-d]pyrimidines., 43 (16):[PMID:10956221][10.1021/jm000130i]