3-ethoxycarbonylmethyl-5-methoxy-indole-2-carboxylic acid ethyl ester

3-carboxymethyl-5-methoxy-indole-2-carboxylic acid

ethyl 2-(5-methoxy-1H-indol-3-yl)acetate

对甲氧基苯胺

2-(5-methoxy-1H-indol-3-yl)-2-oxoacetic acid