三氟乙酸 、
(S)-2-[7-(2-Amino-4-oxo-3,4-dihydro-quinazolin-6-yl)-6-hydroxymethyl-heptanoylamino]-pentanedioic acid di-tert-butyl ester 以
氯仿 为溶剂,
以62%的产率得到(6RS)-N-[7-(2-amino-3,4-dihydro-4-oxo-quinazolin-6-yl)-6-hydroxymethyl-1-oxo-1-heptyl]-L-glutamic acid trifluoroacetate