4-amino-4-deoxy-5,8,10-trideazapteroic acid 、
(S)-2-amino-4-methylene-pentanedioic acid dimethyl ester hydrochloride 以to form (S)-2-{4-[2-(2,4-diamino-quinazolin-6-yl)-ethyl]benzoylamino}-4-methylene-pentanedioic acid dimethyl ester的产率得到(S)-2-{4-[2-(2,4-diamino-quinazolin-6-yl)-ethyl]-benzoylamino}-4-methylene-pentanedioic acid dimethyl ester