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The novel crystal of the title compound 2-(((5-(((5,7-dimethyl-[1,2,4]triazolo-[1, 5-a]-pyrimidin-2-yl)thio)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)methyl)-4H-chromen-4-one methanol solvate(C27H25N7O3S2, Mr = 559.66) has been prepared and its structur