For the compound cyclopentyl butyl ether, draw its condensed structural formula if it is straight-chain or line-angle formula if it is cyclic.

Condensed structural formula of cyclopentyl butyl ether in line-angle format.

Cyclic structure representation of cyclopentyl butyl ether.

Line-angle formula of cyclopentyl butyl ether showing carbon and oxygen connections.

Detailed structural formula of cyclopentyl butyl ether with labeled atoms.