CC(OC([NH:8][C@H:9]([C:15]([O:17][CH3:18])=[O:16])[CH2:10][CH2:11][C:12]([OH:14])=O)=O)(C)C.F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2N=CC=CC=2N=N1.C1C=NC2N(O)N=NC=2C=1.[NH2:53][C:54]1[CH:55]=[C:56]([S:60]([OH:63])(=[O:62])=[O:61])[CH:57]=[CH:58][CH:59]=1>C(Cl)Cl.FC(F)(F)C(O)=O.C(N(CC)CC)C>[NH2:8][C@H:9]([C:15]([O:17][CH3:18])=[O:16])[CH2:10][CH2:11][C:12]([NH:53][C:54]1[CH:55]=[C:56]([S:60]([OH:63])(=[O:61])=[O:62])[CH:57]=[CH:58][CH:59]=1)=[O:14]Boc-Glu-OME, 130 mg (0.5 mmol), 190 mg (0.5 mmol) of 2-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HATU), 70 mg (0.5 mmol) of 7-aza-1-hydroxybenzotriazole (HOAt) and 87 mg (0.5 mmol) of 3-aminobenzenesulfonic acid were suspended in 2.0 ml of methylene chloride, and 0.5 ml of triethylamine was added to the suspension. The mixture was stirred at room temperature overnight. After the solvent was removed by distillation, the purification step A was applied to give the intermediate. The crude product was dissolved in 4.0 ml of trifluoroacetic acid (TFA) and stirred at room temperature for an hour. After the solvent was removed by distillation, the purification step A was applied to give 7.4 mg of the title compound.
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