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What is the molecular formula of the molecule 2-bromo-5-(5-bromothiophen-2-yl)thiophene;2-bromo-5-[5-[5-(5-bromothiophen-2-yl)thiophen-2-yl]thiophen-2-yl]thiophene;3-ethynyl-5-[5-[5-[5-[5-(4-ethynyl-5-hept-1-ynylthiophen-2-yl)thiophen-2-yl]thiophen-2-yl]thiophen-2-yl]thiophen-2-yl]-2-hept-1-ynylthiophene;methane ?
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C68H54Br4S12
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