benzyl hexahydro-1H-pyrido[1,2-a]pyrazine-2(6H)-carboxylate

六氢-2H-吡啶并[1,2-a]吡嗪-1(6H)-酮

3,6,7,8,9,9a-hexahydro-2H-pyrido[1,2-a]pyrazine-1,4(3H,6H)-dione

1-[2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-ethyl]-piperidine-2-carboxylic acid ethyl ester

2-哌啶甲酸乙酯