[CH3:1][S:2]([O-])(=O)=O.[O:6]=[C:7]1[CH2:12][N:11](S(C2C=CC(C)=CC=2)(=O)=O)[CH2:10][C:9]2C=CS[C:8]1=2.[CH2:26](O)C.C1CCCCC1>>[OH:6][C:7]1[CH:12]=[N:11][CH:10]=[C:9]2[S:2][CH:1]=[CH:26][C:8]=12This compound is prepared according to the procedure of Example 1(c), from the methanesulfonate described in (b) above (Yield: 80%). White crystals; M.p.=206° C. (ethanol-cyclohexane)
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