N-甲酰-DL-色氨酸

L-3,4-dihydro-β-carboline-3-carboxylic acid hydrochloride

ethyl α-(hydroxyimino)-β-(2-formylindol-3-yl)propanoate

ethyl 2-azido-3-(1-methoxymethyl-2-methylindol-3-yl)propenoate