3,4-Dimethoxysalicylaldehyde, hydroxyveratraldehyde, 2-Hydroxy-3,4-methoxybenzaldehyde, 2-hydroxy-3,4-dimethoxy-benzaldehyde, 3,4-Dimethoxy-2-hydroxybenzaldehyde, 4-hydroxy-3,4-dimethoxybenzaldehyde
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