5,6-二氢-4H-吡咯并[1,2-B]吡唑-2-羧酸

1-苯丙醇

(R)-4-hydroxy-4-phenyl-but-2-ynoic acid ethyl ester

2,2,2-三氟苯乙酮

ethyl 3-(p-methoxyphenyl)isothiazole-4-carboxylate