3,4,5,6-tetrahydrocyclopenta[d][1,3]thiazol-2-one

螺[2.4]庚烷-7-酮

2-(2-oxopropyl)cyclopentan-1-one

6,7-二氢-5H-环戊二烯并[d]咪唑并[2,1-b][1,3]噻唑-2-甲醛

1-丙-2-烯基环戊烯