5-己烯酸

(1RS,2RS,6RS,7SR)-1,6,7-trimethyltricyclo[5.2.2.02,6]undec-8-en-2-ol

2-methyl-2-(p-tolylthio)cyclopentan-1-one

甲基环戊烯醇酮

1-chloro-2-methylcyclopentene