ethyl 1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylate

ethyl (1S,3S)-1-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate

ethyl 9-methoxymethyl-1-methylpyrido[3,4-b]indole-3-carboxylate

L-色氨酸

(3S)-1-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid