乙基5-碘戊酸酯

(4R,5R)-1,3-dibenzyl-3,3a,6,6a-tetrahydro-1H-thieno[3,4-d]imidazole-2,4-dione

(3E,5E)-5-((3aS,6aR)-1,3-dibenzyl-2-oxohexahydro-4H-thieno[3,4-d]imidazol-4-ylidene)pent-3-enoic acid

ethyl 5-(1-thia-4-azaspiro[4.5]dec-3-en-2-yl)pentanoate

ethyl 5-((1'R,7'S,7a'R)-7'-(hydroxymethyl)-5'-thioxotetrahydro-1'H-spiro[cyclohexane-1,3'-imidazo[1,5-c]thiazol]-1'-yl)pentanoate