2,3,4,5,6,7-hexahydrocyclopenta[b]pyran

1-环戊基哌啶

2,3,4,5,6,7-hexahydro-1H-cyclopenta[b]azepin-8-one

3-硝基-6,7-二氢-5-氢-环戊烷[B]吡啶

3-(2-氧代环戊基)丙腈