4-(2,6-dimethoxyphenyl)-4-hydroxybut-2-ynoic acid

4-hydroxy-4-(2-methoxy-6-phenylmethoxyphenyl)but-2-ynoic acid

trimethylsilyl N,N-dihexylcarbamate

trimethylsilyl N-pentylcarbamate

6-乙氧基-2-萘酸