NAlpha-(2,4-dinitro-phenyl)-L-histidine

Mikimopine lactam

(4S,6S)-4-(2-羧基乙基)-1,5,6,7-四氢咪唑并[4,5-c]吡啶-4,6-二甲酸

Mikimopine

N-Boc-N'-三苯甲基-L-组氨酸