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What is the molecular formula of the molecule (6R)-10-bromo-6-(2-bromo-5-hydroxyphenyl)-3-ethylsulfanyl-6,7-dihydro-2H-[1,2,4]triazino[1,6-c]quinazolin-5-ium-1-one ?
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C18H15Br2N4O2S+
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