for the following products
(S)-2-(tert-Butoxycarbonyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid | Boc-L-Tpi-OH (Boc-L-1,2,3,4-tetrahydronorharman-3-carboxylic acid) | N-alpha-(tert-Butyloxycarbonyl)-1,2,3,4-tetrahydronorharman-L-3-carboxylic acid | N-Boc-L-1,2,3,4-Tetrahydro-beta-carboline-3-carboxylic acid and Boc-L-1,2,3,4-Tetrahydronorharman-3-carboxylic acid
