2-氮杂双环[2.2.1]庚-5-烯-3-酮

3-氨基环戊羧酸

3-azabicyclo[2.2.1]hepta-2,5-diene

(E)-3-((1R,3S,4R,5R)-3-Formylamino-4-hydroxy-6-oxa-bicyclo[3.1.0]hex-1-yl)-acrylic acid methyl ester

(E)-3-((1R,3S,4R,5R)-3-Isocyano-4-methanesulfonyloxy-6-oxa-bicyclo[3.1.0]hex-1-yl)-acrylic acid methyl ester