2-chloro-4-[5-(penta-1,3-diyn-1-yl)thiophen-2-yl]but-3-yn-1-yl acetate;2-
-5-<3-chlor-4-acetoxy-butin-(1)-yl>-thiophen;2-<4-Acetoxy-3-chlor-butin-(1)-yl>-5--thiophen;4-acetoxy-3-chloro-1-(5-penta-1,3-diynyl-thiophen-2-yl)-but-1-yne;[2-chloro-4-(5-penta-1,3-diynylthiophen-2-yl)but-3-ynyl] acetate