[NH2:1][C:2]1[N:6]=[C:5]([S:7][CH2:8][CH2:9][S:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH3:16])[NH:4][N:3]=1.C(SCCSCCSC1N=C2N(N=1)[C:36]([OH:39])=[CH:35][C:34]([CH3:40])=N2)CCCCC>>[CH2:11]([S:10][CH2:9][CH2:8][S:7][C:5]1[N:6]=[C:2]2[N:3]([N:4]=1)[C:36]([OH:39])=[CH:35][C:34]([CH3:40])=[N:1]2)[CH2:12][CH2:13][CH2:14][CH2:15][CH3:16]Compound 13 was prepared from Compound 6, using a procedure analogous to that described previously for Compound 20. The crude product was recrystallized from ethyl acetate to give a white solid, m.p. 125.5°-126° C. Analysis: Calculated for C14H22N4OS2 : C, 51.50; H, 6.79; N, 17.16. Found: C, 50.87; H, 6.62; N, 17.04.
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