Ethyl 3-(2-amino-5-phenoxyphenyl)thio-2-hydroxy-3-(3,4-methylenedioxyphenyl)propionate 、
氢氧化钾 以to give 7.84 g of the title compound as a powder, melting at 158-159° C的产率得到3-(2-Amino-5-phenoxyphenyl)thio-2-hydroxy-3-(3,4-methylenedioxyphenyl)propionic acid