Benzene, 1,1'-[(1Z)-1-buten-3-yne-1,4-diyl]bis-

(E)-pent-3-en-1-yn-1-ylbenzene

1-[(Z)-pent-3-en-1-ynyl]benzene

溴乙烯

(1-cyclopentylidene-3-butenyl)benzene