5-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1H-1,2,4-triazole-3-carboxylic acid 、
(2R,4'R,8a'R)-1-[(9H-fluoren-9-ylmethoxy)carbonyl]-6'-oxotetrahydro-2'H-spiro[pyrrolidine-2,7'-pyrrole[2,1-b][1,3]thiazine]-4'-carboxylic acid 、
4-氯苯氧基乙酰氯 以1.3 mg的产率得到(4R,7R,8aR)-1'-[3-[[2-(4-chlorophenoxy)acetyl]amino]-1H-1,2,4-triazole-5-carbonyl]-6-oxospiro[3,4,8,8a-tetrahydro-2H-pyrrolo[2,1-b][1,3]thiazine-7,2'-pyrrolidine]-4-carboxamide