8-苄基-1,4-二氧杂-8-氮杂螺[4,5]癸烷

2-哌嗪酮

2'-acetylamino-4'-methyl-[4,5']bithiazolyl-2-carbonyl chloride

8-benzyloxycarbonyl-1,4-dioxa-8-azaspiro[4.5]decane

8-(3,4,5,6-tetrahydropyridin-2-yl)-1,4-dioxa-8-azaspiro[4.5]decane