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Figure 2: Chemical structures of 5,7-dimethoxy-4-pmethoxylphenylcoumarin (1), 5,7-dimethoxy-4-phenylcoumarin (2)

Figure 2: Chemical structures of 5,7-dimethoxy-4-pmethoxylphenylcoumarin (1), 5,7-dimethoxy-4-phenylcoumarin (2)