4b,5,6,7,7a,8-Hexahydropentaleno<2,1-b>pyridin-2-one

2-(2 cyclopentenyl)pyridine

2-cyclopent-2-en-1-ylbutanedioic acid

1-环戊烯苯甲烷

1-(1-环戊烯基)哌啶