三氟乙酸 、
di-tert-butyl N--N-prop-2-ynylamino>benzoyl>-L-γ-glutamyl>-D-alaninate 反应 1.25h,
以79%的产率得到(S)-4-((R)-1-Carboxy-ethylcarbamoyl)-2-{4-[(2-methyl-4-oxo-3,4-dihydro-quinazolin-6-ylmethyl)-prop-2-ynyl-amino]-benzoylamino}-butyric acid; compound with trifluoro-acetic acid