| Poly[oxycarbonyloxy-3-butyne-1,4-diyl[(5,5-dimethyl-1,3-dioxan-2-yl)[(3,5-di-1-pentyn-1-ylphenyl)ethynyl]-1,4-phenylene]-1-butyne-1,4-diyloxycarbonyloxy-3-butyne-1,4-diyl[1,3-dioxolan-2-yl[(3,5-di-1-pentyn-1-ylphenyl)ethynyl]-1,4-phenylene]-1-butyne-1,4-d |
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