Patent ID: 11952368
Assignee: XIAMEN UNIVERSITY
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A  Y | IPC A  C

Claim 5:
6. The preparation method according to claim 1, wherein the first condensation reagent, the second condensation reagent, the third condensation reagent, and the fourth condensation reagent each independently comprise one or more selected from the group consisting of 2-(7-azabenzotriazole)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HATU), O—(N-succinimidyl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TSTU), and O-benzotriazole-tetramethyluronium hexafluorophosphate (HBTU); and
the first organic base, the second organic base, the third organic base, and the fourth organic base each independently comprise an organic amine and/or 4-dimethylaminopyridine (4-DMAP).