1-aza-6-hydroxy-10-carbomethoxy-3-(2-carbomethoxyethyl)-2,5-idoxobicyclo<4.4.0>dec-3-ene

1-aza-10-carbomethoxy-3-(2-carbomethoxyethyl)-2,5-dioxo-4-(phenylselenenyl)bicyclo[4.4.0]decane

phenylmethyl octahydro-1'-methylene-4',5-dioxospiro(furan-2(3H),3'(4'H)-(2H)quinolizine)-6'-carboxylate

alpha-酮戊二酸二甲酯

tetrahydro-5-oxo-2-(2-(propynyl))-2-furancarboxylic acid