1,7-Diazaspiro[3.5]nonane-7-carboxylic acid tert-butyl ester
4-Oxohexahydrocyclopenta[c]pyrrole-2-carboxylic acid tert-butyl ester
1,7-Diazaspiro[4.5]decane-7-carboxylic acid tert-butyl ester
6-Hydroxy-2-azaspiro[3.3]heptane-2-carboxylic acid tert-butyl ester
4,4,5,5-Tetramethyl-2-(1,4-dioxaspiro-[4.5]dec-7-en-7-yl)-1,3,2-dioxaborolane
1-(2-Chloroacetyl)-5,11-dihydro-pyrido-[2,3-b][1,4]benzodiazepin-6-one